16931434 has 12 divisors (see below), whose sum is σ = 27501606. Its totient is φ = 7814352.

The previous prime is 16931429. The next prime is 16931437. The reversal of 16931434 is 43413961.

It can be written as a sum of positive squares in 3 ways, for example, as 3790809 + 13140625 = 1947^2 + 3625^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16931396 and 16931405.

It is not an unprimeable number, because it can be changed into a prime (16931437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24709 + ... + 25384.

Almost surely, 2^16931434 is an apocalyptic number.

16931434 is a deficient number, since it is larger than the sum of its proper divisors (10570172).

16931434 is a wasteful number, since it uses less digits than its factorization.

16931434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50121 (or 50108 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 16931434 is about 4114.7823757764. The cubic root of 16931434 is about 256.7820020998.

The spelling of 16931434 in words is "sixteen million, nine hundred thirty-one thousand, four hundred thirty-four".