18572315249881 has 16 divisors (see below), whose sum is σ = 19862678845440. Its totient is φ = 17331700075200.

The previous prime is 18572315249861. The next prime is 18572315249921. The reversal of 18572315249881 is 18894251327581.

It is a cyclic number.

It is not a de Polignac number, because 18572315249881 - 2²⁹ = 18571778378969 is a prime.

It is a super-2 number, since 2×18572315249881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18572315249861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57151801 + ... + 57475846.

It is an arithmetic number, because the mean of its divisors is an integer number (1241417427840).

Almost surely, 2^{18572315249881} is an apocalyptic number.

It is an amenable number.

18572315249881 is a deficient number, since it is larger than the sum of its proper divisors (1290363595559).

18572315249881 is a wasteful number, since it uses less digits than its factorization.

18572315249881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114627864.

The product of its digits is 38707200, while the sum is 64.

The spelling of 18572315249881 in words is "eighteen trillion, five hundred seventy-two billion, three hundred fifteen million, two hundred forty-nine thousand, eight hundred eighty-one".