20697372 has 36 divisors (see below), whose sum is σ = 53105416. Its totient is φ = 6795360.

The previous prime is 20697371. The next prime is 20697379. The reversal of 20697372 is 27379602.

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 not an unprimeable number, because it can be changed into a prime (20697371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1879 + ... + 6702.

Almost surely, 2^20697372 is an apocalyptic number.

It is an amenable number.

20697372 is an abundant number, since it is smaller than the sum of its proper divisors (32408044).

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

20697372 is a wasteful number, since it uses less digits than its factorization.

20697372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8658 (or 8653 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20697372 is about 4549.4364486165. The cubic root of 20697372 is about 274.5607179530.

The spelling of 20697372 in words is "twenty million, six hundred ninety-seven thousand, three hundred seventy-two".