31469921906 has 8 divisors (see below), whose sum is σ = 47388560220. Its totient is φ = 15673735168.

The previous prime is 31469921897. The next prime is 31469921941. The reversal of 31469921906 is 60912996413.

It can be written as a sum of positive squares in 2 ways, for example, as 27106658881 + 4363263025 = 164641^2 + 66055^2 .

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

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, 30612251 + ... + 30613278.

Almost surely, 2^31469921906 is an apocalyptic number.

31469921906 is a deficient number, since it is larger than the sum of its proper divisors (15918638314).

31469921906 is a wasteful number, since it uses less digits than its factorization.

31469921906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61225788.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 31469921906 in words is "thirty-one billion, four hundred sixty-nine million, nine hundred twenty-one thousand, nine hundred six".