20871792 has 60 divisors (see below), whose sum is σ = 58792864. Its totient is φ = 6912000.

The previous prime is 20871769. The next prime is 20871853. The reversal of 20871792 is 29717802.

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, 27417 + ... + 28167.

Almost surely, 2^20871792 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 20871792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29396432).

20871792 is an abundant number, since it is smaller than the sum of its proper divisors (37921072).

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

20871792 is a wasteful number, since it uses less digits than its factorization.

20871792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 20871792 is about 4568.5656392351. The cubic root of 20871792 is about 275.3298169532.

The spelling of 20871792 in words is "twenty million, eight hundred seventy-one thousand, seven hundred ninety-two".