18692874564 has 144 divisors (see below), whose sum is σ = 54718489728. Its totient is φ = 4922975232.

The previous prime is 18692874553. The next prime is 18692874581. The reversal of 18692874564 is 46547829681.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18692874498 and 18692874507.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7466937 + ... + 7469439.

It is an arithmetic number, because the mean of its divisors is an integer number (379989512).

Almost surely, 2^18692874564 is an apocalyptic number.

18692874564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18692874564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27359244864).

18692874564 is an abundant number, since it is smaller than the sum of its proper divisors (36025615164).

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

18692874564 is a wasteful number, since it uses less digits than its factorization.

18692874564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514 (or 3505 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 60.

The spelling of 18692874564 in words is "eighteen billion, six hundred ninety-two million, eight hundred seventy-four thousand, five hundred sixty-four".