18947323982 has 24 divisors (see below), whose sum is σ = 30065325696. Its totient is φ = 8954172864.

The previous prime is 18947323981. The next prime is 18947323999. The reversal of 18947323982 is 28932374981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18947323981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282323 + ... + 342929.

It is an arithmetic number, because the mean of its divisors is an integer number (1252721904).

Almost surely, 2^18947323982 is an apocalyptic number.

18947323982 is a deficient number, since it is larger than the sum of its proper divisors (11118001714).

18947323982 is a wasteful number, since it uses less digits than its factorization.

18947323982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61080 (or 61061 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The spelling of 18947323982 in words is "eighteen billion, nine hundred forty-seven million, three hundred twenty-three thousand, nine hundred eighty-two".