18645057910 has 16 divisors (see below), whose sum is σ = 34379668512. Its totient is φ = 7276120000.

The previous prime is 18645057901. The next prime is 18645057947. The reversal of 18645057910 is 1975054681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22737466 + ... + 22738285.

It is an arithmetic number, because the mean of its divisors is an integer number (2148729282).

Almost surely, 2^18645057910 is an apocalyptic number.

18645057910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18645057910 is a deficient number, since it is larger than the sum of its proper divisors (15734610602).

18645057910 is a wasteful number, since it uses less digits than its factorization.

18645057910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45475799.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 18645057910 in words is "eighteen billion, six hundred forty-five million, fifty-seven thousand, nine hundred ten".