18940425476 has 24 divisors (see below), whose sum is σ = 38414388096. Its totient is φ = 8002995840.

The previous prime is 18940425463. The next prime is 18940425487. The reversal of 18940425476 is 67452404981.

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, 4761701 + ... + 4765676.

It is an arithmetic number, because the mean of its divisors is an integer number (1600599504).

Almost surely, 2^18940425476 is an apocalyptic number.

It is an amenable number.

18940425476 is an abundant number, since it is smaller than the sum of its proper divisors (19473962620).

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

18940425476 is a wasteful number, since it uses less digits than its factorization.

18940425476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9527459 (or 9527457 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 18940425476 in words is "eighteen billion, nine hundred forty million, four hundred twenty-five thousand, four hundred seventy-six".