20713608 has 24 divisors (see below), whose sum is σ = 56099550. Its totient is φ = 6904512.

The previous prime is 20713607. The next prime is 20713613. The reversal of 20713608 is 80631702.

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 8054244 = 3558^2 + 2838^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20713601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143773 + ... + 143916.

Almost surely, 2^20713608 is an apocalyptic number.

It is an amenable number.

20713608 is an abundant number, since it is smaller than the sum of its proper divisors (35385942).

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

20713608 is a wasteful number, since it uses less digits than its factorization.

20713608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287701 (or 287694 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20713608 is about 4551.2204956473. The cubic root of 20713608 is about 274.6324920039.

It can be divided in two parts, 20713 and 608, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 20713608 in words is "twenty million, seven hundred thirteen thousand, six hundred eight".