1151023020 has 96 divisors (see below), whose sum is σ = 3688022016. Its totient is φ = 262752000.

The previous prime is 1151023009. The next prime is 1151023031. The reversal of 1151023020 is 203201511.

1151023020 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1151023009) and next prime (1151023031).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482230 + ... + 484610.

It is an arithmetic number, because the mean of its divisors is an integer number (38416896).

Almost surely, 2^1151023020 is an apocalyptic number.

1151023020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1151023020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1844011008).

1151023020 is an abundant number, since it is smaller than the sum of its proper divisors (2536998996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1151023020 is a wasteful number, since it uses less digits than its factorization.

1151023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551 (or 3549 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1151023020 is about 33926.7301695875. The cubic root of 1151023020 is about 1048.0001298972. Note that the first 3 decimals are identical.

Adding to 1151023020 its reverse (203201511), we get a palindrome (1354224531).

The spelling of 1151023020 in words is "one billion, one hundred fifty-one million, twenty-three thousand, twenty".