18676223643 has 16 divisors (see below), whose sum is σ = 31046190336. Its totient is φ = 9701934240.

The previous prime is 18676223639. The next prime is 18676223653. The reversal of 18676223643 is 34632267681.

It is not a de Polignac number, because 18676223643 - 2² = 18676223639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18676223592 and 18676223601.

It is not an unprimeable number, because it can be changed into a prime (18676223653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40424496 + ... + 40424957.

It is an arithmetic number, because the mean of its divisors is an integer number (1940386896).

Almost surely, 2^18676223643 is an apocalyptic number.

18676223643 is a deficient number, since it is larger than the sum of its proper divisors (12369966693).

18676223643 is a wasteful number, since it uses less digits than its factorization.

18676223643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80849474.

The product of its digits is 1741824, while the sum is 48.

The spelling of 18676223643 in words is "eighteen billion, six hundred seventy-six million, two hundred twenty-three thousand, six hundred forty-three".