20713896 has 96 divisors (see below), whose sum is σ = 65108160. Its totient is φ = 5826816.

The previous prime is 20713873. The next prime is 20713907. The reversal of 20713896 is 69831702.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20713896.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36511 + ... + 37073.

It is an arithmetic number, because the mean of its divisors is an integer number (678210).

Almost surely, 2^20713896 is an apocalyptic number.

20713896 is the 2628-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20713896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32554080).

20713896 is an abundant number, since it is smaller than the sum of its proper divisors (44394264).

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

20713896 is a wasteful number, since it uses less digits than its factorization.

20713896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20713896 is about 4551.2521354019. The cubic root of 20713896 is about 274.6337648192.

It can be divided in two parts, 20713 and 896, that added together give a square (21609 = 147²).

The spelling of 20713896 in words is "twenty million, seven hundred thirteen thousand, eight hundred ninety-six".