18492547947 has 8 divisors (see below), whose sum is σ = 25121952144. Its totient is φ = 12095754528.

The previous prime is 18492547939. The next prime is 18492547951. The reversal of 18492547947 is 74974529481.

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

It is not a de Polignac number, because 18492547947 - 2³ = 18492547939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18492547937) 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, 58152508 + ... + 58152825.

It is an arithmetic number, because the mean of its divisors is an integer number (3140244018).

Almost surely, 2^18492547947 is an apocalyptic number.

18492547947 is a deficient number, since it is larger than the sum of its proper divisors (6629404197).

18492547947 is a wasteful number, since it uses less digits than its factorization.

18492547947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116305389.

The product of its digits is 20321280, while the sum is 60.

The spelling of 18492547947 in words is "eighteen billion, four hundred ninety-two million, five hundred forty-seven thousand, nine hundred forty-seven".