17947448972 has 12 divisors (see below), whose sum is σ = 31410176616. Its totient is φ = 8973112800.

The previous prime is 17947448957. The next prime is 17947448983. The reversal of 17947448972 is 27984474971.

It is a super-2 number, since 2×17947448972² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83393 + ... + 207000.

It is an arithmetic number, because the mean of its divisors is an integer number (2617514718).

Almost surely, 2^17947448972 is an apocalyptic number.

It is an amenable number.

17947448972 is a deficient number, since it is larger than the sum of its proper divisors (13462727644).

17947448972 is a wasteful number, since it uses less digits than its factorization.

17947448972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305848 (or 305846 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 62.

The spelling of 17947448972 in words is "seventeen billion, nine hundred forty-seven million, four hundred forty-eight thousand, nine hundred seventy-two".