18712257571418 has 16 divisors (see below), whose sum is σ = 28343841252480. Its totient is φ = 9264329373936.

The previous prime is 18712257571339. The next prime is 18712257571457. The reversal of 18712257571418 is 81417575221781.

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, 2733230 + ... + 6700377.

It is an arithmetic number, because the mean of its divisors is an integer number (1771490078280).

Almost surely, 2^{18712257571418} is an apocalyptic number.

18712257571418 is a deficient number, since it is larger than the sum of its proper divisors (9631583681062).

18712257571418 is a wasteful number, since it uses less digits than its factorization.

18712257571418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9443341.

The product of its digits is 8780800, while the sum is 59.

The spelling of 18712257571418 in words is "eighteen trillion, seven hundred twelve billion, two hundred fifty-seven million, five hundred seventy-one thousand, four hundred eighteen".