20725108 has 12 divisors (see below), whose sum is σ = 38402532. Its totient is φ = 9752960.

The previous prime is 20725051. The next prime is 20725123. The reversal of 20725108 is 80152702.

It can be written as a sum of positive squares in 2 ways, for example, as 16875664 + 3849444 = 4108^2 + 1962^2 .

It is a super-2 number, since 2×20725108² = 859060203223328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152323 + ... + 152458.

It is an arithmetic number, because the mean of its divisors is an integer number (3200211).

Almost surely, 2^20725108 is an apocalyptic number.

It is an amenable number.

20725108 is a deficient number, since it is larger than the sum of its proper divisors (17677424).

20725108 is a wasteful number, since it uses less digits than its factorization.

20725108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304802 (or 304800 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20725108 is about 4552.4837177084. The cubic root of 20725108 is about 274.6833070584.

The spelling of 20725108 in words is "twenty million, seven hundred twenty-five thousand, one hundred eight".