20716992 has 112 divisors (see below), whose sum is σ = 64211200. Its totient is φ = 6531840.

The previous prime is 20716987. The next prime is 20717023. The reversal of 20716992 is 29961702.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32517 + ... + 33147.

Almost surely, 2^20716992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20716992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32105600).

20716992 is an abundant number, since it is smaller than the sum of its proper divisors (43494208).

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

20716992 is a wasteful number, since it uses less digits than its factorization.

20716992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 20716992 is about 4551.5922488729. The cubic root of 20716992 is about 274.6474468385.

The spelling of 20716992 in words is "twenty million, seven hundred sixteen thousand, nine hundred ninety-two".