31994609205 has 32 divisors (see below), whose sum is σ = 55372109184. Its totient is φ = 15681782016.

The previous prime is 31994609201. The next prime is 31994609321. The reversal of 31994609205 is 50290649913.

It is not a de Polignac number, because 31994609205 - 2² = 31994609201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31994609201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317134 + ... + 405663.

It is an arithmetic number, because the mean of its divisors is an integer number (1730378412).

Almost surely, 2^31994609205 is an apocalyptic number.

It is an amenable number.

31994609205 is a deficient number, since it is larger than the sum of its proper divisors (23377499979).

31994609205 is a wasteful number, since it uses less digits than its factorization.

31994609205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723045.

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 31994609205 in words is "thirty-one billion, nine hundred ninety-four million, six hundred nine thousand, two hundred five".