18476220639 has 8 divisors (see below), whose sum is σ = 24680498992. Its totient is φ = 12294711360.

The previous prime is 18476220593. The next prime is 18476220683. The reversal of 18476220639 is 93602267481.

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

It is not a de Polignac number, because 18476220639 - 2⁹ = 18476220127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18476225639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5690374 + ... + 5693619.

It is an arithmetic number, because the mean of its divisors is an integer number (3085062374).

Almost surely, 2^18476220639 is an apocalyptic number.

18476220639 is a deficient number, since it is larger than the sum of its proper divisors (6204278353).

18476220639 is a wasteful number, since it uses less digits than its factorization.

18476220639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11384537.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 18476220639 in words is "eighteen billion, four hundred seventy-six million, two hundred twenty thousand, six hundred thirty-nine".