20526725 has 6 divisors (see below), whose sum is σ = 25453170. Its totient is φ = 16421360.

The previous prime is 20526721. The next prime is 20526763. The reversal of 20526725 is 52762502.

It can be written as a sum of positive squares in 3 ways, for example, as 14884 + 20511841 = 122^2 + 4529^2 .

It is not a de Polignac number, because 20526725 - 2² = 20526721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20526721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 410510 + ... + 410559.

It is an arithmetic number, because the mean of its divisors is an integer number (4242195).

Almost surely, 2^20526725 is an apocalyptic number.

20526725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20526725 is a deficient number, since it is larger than the sum of its proper divisors (4926445).

20526725 is an equidigital number, since it uses as much as digits as its factorization.

20526725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821079 (or 821074 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20526725 is about 4530.6428903634. The cubic root of 20526725 is about 273.8040627710.

The spelling of 20526725 in words is "twenty million, five hundred twenty-six thousand, seven hundred twenty-five".