18693404345152 has 28 divisors (see below), whose sum is σ = 38291328259456. Its totient is φ = 9045195649920.

The previous prime is 18693404345137. The next prime is 18693404345159. The reversal of 18693404345152 is 25154340439681.

It is a super-2 number, since 2×18693404345152² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18693404345093 and 18693404345102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18693404345159) 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, 4711037418 + ... + 4711041385.

Almost surely, 2^{18693404345152} is an apocalyptic number.

It is an amenable number.

18693404345152 is an abundant number, since it is smaller than the sum of its proper divisors (19597923914304).

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

18693404345152 is an equidigital number, since it uses as much as digits as its factorization.

18693404345152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9422078846 (or 9422078836 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 18693404345152 in words is "eighteen trillion, six hundred ninety-three billion, four hundred four million, three hundred forty-five thousand, one hundred fifty-two".