18974377964 has 12 divisors (see below), whose sum is σ = 33263318088. Its totient is φ = 9470572800.

The previous prime is 18974377951. The next prime is 18974377969. The reversal of 18974377964 is 46977347981.

It is a self number, because there is not a number n which added to its sum of digits gives 18974377964.

It is not an unprimeable number, because it can be changed into a prime (18974377969) 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 3 ways as a sum of consecutive naturals, for example, 4151477 + ... + 4156044.

It is an arithmetic number, because the mean of its divisors is an integer number (2771943174).

Almost surely, 2^18974377964 is an apocalyptic number.

It is an amenable number.

18974377964 is a deficient number, since it is larger than the sum of its proper divisors (14288940124).

18974377964 is a wasteful number, since it uses less digits than its factorization.

18974377964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8308096 (or 8308094 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 65.

The spelling of 18974377964 in words is "eighteen billion, nine hundred seventy-four million, three hundred seventy-seven thousand, nine hundred sixty-four".