16021972 has 12 divisors (see below), whose sum is σ = 28690816. Its totient is φ = 7824600.

The previous prime is 16021969. The next prime is 16021987. The reversal of 16021972 is 27912061.

It is a happy number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16021972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46404 + ... + 46747.

Almost surely, 2^16021972 is an apocalyptic number.

It is an amenable number.

16021972 is a deficient number, since it is larger than the sum of its proper divisors (12668844).

16021972 is a wasteful number, since it uses less digits than its factorization.

16021972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93198 (or 93196 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 16021972 is about 4002.7455577391. The cubic root of 16021972 is about 252.0995029918.

The spelling of 16021972 in words is "sixteen million, twenty-one thousand, nine hundred seventy-two".