20725508 has 12 divisors (see below), whose sum is σ = 36412572. Its totient is φ = 10321920.

The previous prime is 20725501. The next prime is 20725547. The reversal of 20725508 is 80552702.

It can be written as a sum of positive squares in 2 ways, for example, as 17909824 + 2815684 = 4232^2 + 1678^2 .

It is not an unprimeable number, because it can be changed into a prime (20725501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9053 + ... + 11108.

It is an arithmetic number, because the mean of its divisors is an integer number (3034381).

Almost surely, 2^20725508 is an apocalyptic number.

It is an amenable number.

20725508 is a deficient number, since it is larger than the sum of its proper divisors (15687064).

20725508 is a wasteful number, since it uses less digits than its factorization.

20725508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20422 (or 20420 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 20725508 is about 4552.5276495591. The cubic root of 20725508 is about 274.6850742002.

The spelling of 20725508 in words is "twenty million, seven hundred twenty-five thousand, five hundred eight".