18934349651 has 24 divisors (see below), whose sum is σ = 22356622080. Its totient is φ = 15986014800.

The previous prime is 18934349617. The next prime is 18934349653. The reversal of 18934349651 is 15694343981.

It is not a de Polignac number, because 18934349651 - 2³⁰ = 17860607827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18934349593 and 18934349602.

It is not an unprimeable number, because it can be changed into a prime (18934349653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5422016 + ... + 5425506.

It is an arithmetic number, because the mean of its divisors is an integer number (931525920).

Almost surely, 2^18934349651 is an apocalyptic number.

18934349651 is a deficient number, since it is larger than the sum of its proper divisors (3422272429).

18934349651 is a wasteful number, since it uses less digits than its factorization.

18934349651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135 (or 5128 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The spelling of 18934349651 in words is "eighteen billion, nine hundred thirty-four million, three hundred forty-nine thousand, six hundred fifty-one".