18894668542 has 16 divisors (see below), whose sum is σ = 28426357872. Its totient is φ = 9419258880.

The previous prime is 18894668537. The next prime is 18894668543. The reversal of 18894668542 is 24586649881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18894668543) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 929653 + ... + 949759.

It is an arithmetic number, because the mean of its divisors is an integer number (1776647367).

Almost surely, 2^18894668542 is an apocalyptic number.

18894668542 is a deficient number, since it is larger than the sum of its proper divisors (9531689330).

18894668542 is a wasteful number, since it uses less digits than its factorization.

18894668542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21483.

The product of its digits is 26542080, while the sum is 61.

The spelling of 18894668542 in words is "eighteen billion, eight hundred ninety-four million, six hundred sixty-eight thousand, five hundred forty-two".