18880406775 has 48 divisors (see below), whose sum is σ = 34723372800. Its totient is φ = 10058122080.

The previous prime is 18880406767. The next prime is 18880406777. The reversal of 18880406775 is 57760408881.

It is a happy number.

It is not a de Polignac number, because 18880406775 - 2³ = 18880406767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18880406777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 596806 + ... + 627644.

It is an arithmetic number, because the mean of its divisors is an integer number (723403600).

Almost surely, 2^18880406775 is an apocalyptic number.

18880406775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18880406775 is a deficient number, since it is larger than the sum of its proper divisors (15842966025).

18880406775 is a wasteful number, since it uses less digits than its factorization.

18880406775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31765 (or 31754 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 18880406775 in words is "eighteen billion, eight hundred eighty million, four hundred six thousand, seven hundred seventy-five".