20725710 has 32 divisors (see below), whose sum is σ = 49872672. Its totient is φ = 5512320.

The previous prime is 20725709. The next prime is 20725721. The reversal of 20725710 is 1752702.

It is a congruent 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, 15592 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (1558521).

Almost surely, 2^20725710 is an apocalyptic number.

20725710 is an abundant number, since it is smaller than the sum of its proper divisors (29146962).

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

20725710 is a wasteful number, since it uses less digits than its factorization.

20725710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 20725710 is about 4552.5498349826. The cubic root of 20725710 is about 274.6859665982.

The spelling of 20725710 in words is "twenty million, seven hundred twenty-five thousand, seven hundred ten".