18885990677403 has 32 divisors (see below), whose sum is σ = 27289487272960. Its totient is φ = 11579122588320.

The previous prime is 18885990677399. The next prime is 18885990677461. The reversal of 18885990677403 is 30477609958881.

It is not a de Polignac number, because 18885990677403 - 2² = 18885990677399 is a prime.

It is the 4345802-nd Hogben number.

It is not an unprimeable number, because it can be changed into a prime (18885991677403) by changing a digit.

It is a nontrivial repunit in base 4345801.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23236753 + ... + 24035778.

It is an arithmetic number, because the mean of its divisors is an integer number (852796477280).

Almost surely, 2^{18885990677403} is an apocalyptic number.

18885990677403 is a deficient number, since it is larger than the sum of its proper divisors (8403496595557).

18885990677403 is a wasteful number, since it uses less digits than its factorization.

18885990677403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47272759.

The product of its (nonzero) digits is 731566080, while the sum is 75.

The spelling of 18885990677403 in words is "eighteen trillion, eight hundred eighty-five billion, nine hundred ninety million, six hundred seventy-seven thousand, four hundred three".