18712228421425 has 96 divisors (see below), whose sum is σ = 29062218541824. Its totient is φ = 11610928128000.

The previous prime is 18712228421399. The next prime is 18712228421443. The reversal of 18712228421425 is 52412482221781.

It is not a de Polignac number, because 18712228421425 - 2⁹ = 18712228420913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2117482107 + ... + 2117490943.

It is an arithmetic number, because the mean of its divisors is an integer number (302731443144).

Almost surely, 2^{18712228421425} is an apocalyptic number.

It is an amenable number.

18712228421425 is a deficient number, since it is larger than the sum of its proper divisors (10349990120399).

18712228421425 is a wasteful number, since it uses less digits than its factorization.

18712228421425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13819 (or 13814 counting only the distinct ones).

The product of its digits is 1146880, while the sum is 49.

The spelling of 18712228421425 in words is "eighteen trillion, seven hundred twelve billion, two hundred twenty-eight million, four hundred twenty-one thousand, four hundred twenty-five".