20713278 has 16 divisors (see below), whose sum is σ = 41657616. Its totient is φ = 6865920.

The previous prime is 20713261. The next prime is 20713289. The reversal of 20713278 is 87231702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8451 + ... + 10622.

It is an arithmetic number, because the mean of its divisors is an integer number (2603601).

Almost surely, 2^20713278 is an apocalyptic number.

20713278 is an abundant number, since it is smaller than the sum of its proper divisors (20944338).

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

20713278 is a wasteful number, since it uses less digits than its factorization.

20713278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19259.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 20713278 is about 4551.1842414914. The cubic root of 20713278 is about 274.6310335552.

The spelling of 20713278 in words is "twenty million, seven hundred thirteen thousand, two hundred seventy-eight".