18831192706947 has 6 divisors (see below), whose sum is σ = 25108266964228. Its totient is φ = 12554123460484.

The previous prime is 18831192706939. The next prime is 18831192706973. The reversal of 18831192706947 is 74960729113881.

It is not a de Polignac number, because 18831192706947 - 2³ = 18831192706939 is a prime.

It is a super-2 number, since 2×18831192706947² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18831192707947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6263518 + ... + 8768924.

Almost surely, 2^{18831192706947} is an apocalyptic number.

18831192706947 is a deficient number, since it is larger than the sum of its proper divisors (6277074257281).

18831192706947 is an frugal number, since it uses more digits than its factorization.

18831192706947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010817 (or 2505410 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 18831192706947 in words is "eighteen trillion, eight hundred thirty-one billion, one hundred ninety-two million, seven hundred six thousand, nine hundred forty-seven".