1157018020 has 12 divisors (see below), whose sum is σ = 2429737884. Its totient is φ = 462807200.

The previous prime is 1157017999. The next prime is 1157018029. The reversal of 1157018020 is 208107511.

It can be written as a sum of positive squares in 2 ways, for example, as 142850304 + 1014167716 = 11952^2 + 31846^2 .

It is not an unprimeable number, because it can be changed into a prime (1157018029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28925431 + ... + 28925470.

It is an arithmetic number, because the mean of its divisors is an integer number (202478157).

Almost surely, 2^1157018020 is an apocalyptic number.

1157018020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157018020 is an abundant number, since it is smaller than the sum of its proper divisors (1272719864).

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

1157018020 is a wasteful number, since it uses less digits than its factorization.

1157018020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57850910 (or 57850908 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 1157018020 is about 34014.9675878135. The cubic root of 1157018020 is about 1049.8164516652.

The spelling of 1157018020 in words is "one billion, one hundred fifty-seven million, eighteen thousand, twenty".