20726725 has 6 divisors (see below), whose sum is σ = 25701170. Its totient is φ = 16581360.

The previous prime is 20726711. The next prime is 20726737. The reversal of 20726725 is 52762702.

It can be written as a sum of positive squares in 3 ways, for example, as 638401 + 20088324 = 799^2 + 4482^2 .

It is not a de Polignac number, because 20726725 - 2⁷ = 20726597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 414510 + ... + 414559.

Almost surely, 2^20726725 is an apocalyptic number.

20726725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20726725 is a deficient number, since it is larger than the sum of its proper divisors (4974445).

20726725 is an equidigital number, since it uses as much as digits as its factorization.

20726725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829079 (or 829074 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20726725 is about 4552.6613096078. The cubic root of 20726725 is about 274.6904505894.

The spelling of 20726725 in words is "twenty million, seven hundred twenty-six thousand, seven hundred twenty-five".