31693191450 has 24 divisors (see below), whose sum is σ = 78599115168. Its totient is φ = 8451517680.

The previous prime is 31693191449. The next prime is 31693191463. The reversal of 31693191450 is 5419139613.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105643822 + ... + 105644121.

It is an arithmetic number, because the mean of its divisors is an integer number (3274963132).

Almost surely, 2^31693191450 is an apocalyptic number.

31693191450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31693191450 is an abundant number, since it is smaller than the sum of its proper divisors (46905923718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31693191450 is a wasteful number, since it uses less digits than its factorization.

31693191450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211287958 (or 211287953 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The spelling of 31693191450 in words is "thirty-one billion, six hundred ninety-three million, one hundred ninety-one thousand, four hundred fifty".