16813972 has 24 divisors (see below), whose sum is σ = 33715584. Its totient is φ = 7187232.

The previous prime is 16813963. The next prime is 16813987. The reversal of 16813972 is 27931861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18513 + ... + 19399.

It is an arithmetic number, because the mean of its divisors is an integer number (1404816).

Almost surely, 2^16813972 is an apocalyptic number.

It is an amenable number.

16813972 is an abundant number, since it is smaller than the sum of its proper divisors (16901612).

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

16813972 is a wasteful number, since it uses less digits than its factorization.

16813972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575 (or 1573 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 16813972 is about 4100.4843616334. The cubic root of 16813972 is about 256.1868143239.

The spelling of 16813972 in words is "sixteen million, eight hundred thirteen thousand, nine hundred seventy-two".