18937802369978 has 8 divisors (see below), whose sum is σ = 28417197358272. Its totient is φ = 9465403250556.

The previous prime is 18937802369953. The next prime is 18937802369987. The reversal of 18937802369978 is 87996320873981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748960450 + ... + 1748971277.

It is an arithmetic number, because the mean of its divisors is an integer number (3552149669784).

Almost surely, 2^{18937802369978} is an apocalyptic number.

18937802369978 is a deficient number, since it is larger than the sum of its proper divisors (9479394988294).

18937802369978 is a wasteful number, since it uses less digits than its factorization.

18937802369978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497934436.

The product of its (nonzero) digits is 1975228416, while the sum is 80.

The spelling of 18937802369978 in words is "eighteen trillion, nine hundred thirty-seven billion, eight hundred two million, three hundred sixty-nine thousand, nine hundred seventy-eight".