16506972 has 36 divisors (see below), whose sum is σ = 43923880. Its totient is φ = 5212512.

The previous prime is 16506967. The next prime is 16507021. The reversal of 16506972 is 27960561.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 11383 + ... + 12750.

Almost surely, 2^16506972 is an apocalyptic number.

16506972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16506972 is an abundant number, since it is smaller than the sum of its proper divisors (27416908).

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

16506972 is a wasteful number, since it uses less digits than its factorization.

16506972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24162 (or 24157 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 16506972 is about 4062.8773055558. The cubic root of 16506972 is about 254.6180209464.

The spelling of 16506972 in words is "sixteen million, five hundred six thousand, nine hundred seventy-two".