18157436269020 has 72 divisors (see below), whose sum is σ = 55078003483776. Its totient is φ = 4841943725952.

The previous prime is 18157436268991. The next prime is 18157436269039. The reversal of 18157436269020 is 2096263475181.

It is a happy number.

18157436269020 is a `hidden beast` number, since 1 + 8 + 1 + 5 + 7 + 4 + 3 + 626 + 9 + 0 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26884789 + ... + 27551891.

It is an arithmetic number, because the mean of its divisors is an integer number (764972270608).

It is a 1-persistent number, because it is pandigital, but 2⋅18157436269020 = 36314872538040 is not.

Almost surely, 2^{18157436269020} is an apocalyptic number.

18157436269020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18157436269020 is an abundant number, since it is smaller than the sum of its proper divisors (36920567214756).

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

18157436269020 is a wasteful number, since it uses less digits than its factorization.

18157436269020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818331 (or 818326 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 18157436269020 in words is "eighteen trillion, one hundred fifty-seven billion, four hundred thirty-six million, two hundred sixty-nine thousand, twenty".