16518972 has 24 divisors (see below), whose sum is σ = 38779776. Its totient is φ = 5472688.

The previous prime is 16518959. The next prime is 16518973. The reversal of 16518972 is 27981561.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16518972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16518973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2118 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (1615824).

Almost surely, 2^16518972 is an apocalyptic number.

16518972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16518972 is an abundant number, since it is smaller than the sum of its proper divisors (22260804).

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

16518972 is a wasteful number, since it uses less digits than its factorization.

16518972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417 (or 8415 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 16518972 is about 4064.3538231803. The cubic root of 16518972 is about 254.6797055113.

The spelling of 16518972 in words is "sixteen million, five hundred eighteen thousand, nine hundred seventy-two".