18742219648 has 64 divisors (see below), whose sum is σ = 37566922320. Its totient is φ = 9313873920.

The previous prime is 18742219637. The next prime is 18742219679. The reversal of 18742219648 is 84691224781.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 18742219595 and 18742219604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27122983 + ... + 27123673.

Almost surely, 2^18742219648 is an apocalyptic number.

It is an amenable number.

18742219648 is an abundant number, since it is smaller than the sum of its proper divisors (18824702672).

18742219648 is an equidigital number, since it uses as much as digits as its factorization.

18742219648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1683 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The spelling of 18742219648 in words is "eighteen billion, seven hundred forty-two million, two hundred nineteen thousand, six hundred forty-eight".