17947407982 has 8 divisors (see below), whose sum is σ = 30766985136. Its totient is φ = 7691746272.

The previous prime is 17947407949. The next prime is 17947407991. The reversal of 17947407982 is 28970474971.

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

It is a congruent number.

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, 640978843 + ... + 640978870.

It is an arithmetic number, because the mean of its divisors is an integer number (3845873142).

Almost surely, 2^17947407982 is an apocalyptic number.

17947407982 is a deficient number, since it is larger than the sum of its proper divisors (12819577154).

17947407982 is a wasteful number, since it uses less digits than its factorization.

17947407982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281957722.

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 17947407982 in words is "seventeen billion, nine hundred forty-seven million, four hundred seven thousand, nine hundred eighty-two".