20713490 has 32 divisors (see below), whose sum is σ = 42768000. Its totient is φ = 7075584.

The previous prime is 20713489. The next prime is 20713529. The reversal of 20713490 is 9431702.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34634 + ... + 35226.

It is an arithmetic number, because the mean of its divisors is an integer number (1336500).

Almost surely, 2^20713490 is an apocalyptic number.

20713490 is an abundant number, since it is smaller than the sum of its proper divisors (22054510).

20713490 is a wasteful number, since it uses less digits than its factorization.

20713490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20713490 is about 4551.2075320732. The cubic root of 20713490 is about 274.6319704998.

The spelling of 20713490 in words is "twenty million, seven hundred thirteen thousand, four hundred ninety".