18621941694 has 32 divisors (see below), whose sum is σ = 37367301120. Its totient is φ = 6186780000.

The previous prime is 18621941687. The next prime is 18621941717. The reversal of 18621941694 is 49614912681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2433927 + ... + 2441565.

It is an arithmetic number, because the mean of its divisors is an integer number (1167728160).

Almost surely, 2^18621941694 is an apocalyptic number.

18621941694 is an abundant number, since it is smaller than the sum of its proper divisors (18745359426).

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

18621941694 is a wasteful number, since it uses less digits than its factorization.

18621941694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936.

The product of its digits is 746496, while the sum is 51.

The spelling of 18621941694 in words is "eighteen billion, six hundred twenty-one million, nine hundred forty-one thousand, six hundred ninety-four".