1025163020 has 24 divisors (see below), whose sum is σ = 2460391584. Its totient is φ = 351484416.

The previous prime is 1025163001. The next prime is 1025163023. The reversal of 1025163020 is 203615201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1025162983 and 1025163001.

It is not an unprimeable number, because it can be changed into a prime (1025163023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3661157 + ... + 3661436.

It is an arithmetic number, because the mean of its divisors is an integer number (102516316).

Almost surely, 2^1025163020 is an apocalyptic number.

1025163020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025163020 is an abundant number, since it is smaller than the sum of its proper divisors (1435228564).

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

1025163020 is a wasteful number, since it uses less digits than its factorization.

1025163020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322609 (or 7322607 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1025163020 is about 32018.1670306094. The cubic root of 1025163020 is about 1008.3182875670.

Adding to 1025163020 its reverse (203615201), we get a palindrome (1228778221).

The spelling of 1025163020 in words is "one billion, twenty-five million, one hundred sixty-three thousand, twenty".