18940425475 has 12 divisors (see below), whose sum is σ = 24867665064. Its totient is φ = 14261025920.

The previous prime is 18940425463. The next prime is 18940425487. The reversal of 18940425475 is 57452404981.

It is an interprime number because it is at equal distance from previous prime (18940425463) and next prime (18940425487).

It is not a de Polignac number, because 18940425475 - 2²⁷ = 18806207747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22282429 + ... + 22283278.

It is an arithmetic number, because the mean of its divisors is an integer number (2072305422).

Almost surely, 2^18940425475 is an apocalyptic number.

18940425475 is a deficient number, since it is larger than the sum of its proper divisors (5927239589).

18940425475 is a wasteful number, since it uses less digits than its factorization.

18940425475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44565734 (or 44565729 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 18940425475 in words is "eighteen billion, nine hundred forty million, four hundred twenty-five thousand, four hundred seventy-five".