18695274049 has 16 divisors (see below), whose sum is σ = 19547450496. Its totient is φ = 17863372800.

The previous prime is 18695274019. The next prime is 18695274061. The reversal of 18695274049 is 94047259681.

It is not a de Polignac number, because 18695274049 - 2⁷ = 18695273921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18695274019) 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, 661294 + ... + 688984.

It is an arithmetic number, because the mean of its divisors is an integer number (1221715656).

Almost surely, 2^18695274049 is an apocalyptic number.

It is an amenable number.

18695274049 is a deficient number, since it is larger than the sum of its proper divisors (852176447).

18695274049 is a wasteful number, since it uses less digits than its factorization.

18695274049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28056.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 18695274049 in words is "eighteen billion, six hundred ninety-five million, two hundred seventy-four thousand, forty-nine".