12038136858 has 24 divisors (see below), whose sum is σ = 28453778496. Its totient is φ = 3647920200.

The previous prime is 12038136857. The next prime is 12038136881. The reversal of 12038136858 is 85863183021.

12038136858 is a `hidden beast` number, since 1 + 203 + 81 + 368 + 5 + 8 = 666.

It is a super-2 number, since 2×12038136858² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12038136857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30399138 + ... + 30399533.

It is an arithmetic number, because the mean of its divisors is an integer number (1185574104).

Almost surely, 2^12038136858 is an apocalyptic number.

12038136858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12038136858 is an abundant number, since it is smaller than the sum of its proper divisors (16415641638).

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

12038136858 is a wasteful number, since it uses less digits than its factorization.

12038136858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60798690 (or 60798687 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 12038136858 in words is "twelve billion, thirty-eight million, one hundred thirty-six thousand, eight hundred fifty-eight".