16981794 has 24 divisors (see below), whose sum is σ = 36988380. Its totient is φ = 5630688.

The previous prime is 16981787. The next prime is 16981813. The reversal of 16981794 is 49718961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16916769 + 65025 = 4113^2 + 255^2 .

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, 1152 + ... + 5940.

Almost surely, 2^16981794 is an apocalyptic number.

16981794 is an abundant number, since it is smaller than the sum of its proper divisors (20006586).

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

16981794 is a wasteful number, since it uses less digits than its factorization.

16981794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994 (or 4991 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 16981794 is about 4120.8972323998. The cubic root of 16981794 is about 257.0363365681.

The spelling of 16981794 in words is "sixteen million, nine hundred eighty-one thousand, seven hundred ninety-four".