20732725 has 12 divisors (see below), whose sum is σ = 27686596. Its totient is φ = 15310080.

The previous prime is 20732717. The next prime is 20732737. The reversal of 20732725 is 52723702.

It can be written as a sum of positive squares in 6 ways, for example, as 2916 + 20729809 = 54^2 + 4553^2 .

It is not a de Polignac number, because 20732725 - 2³ = 20732717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20732693 and 20732702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31572 + ... + 32221.

Almost surely, 2^20732725 is an apocalyptic number.

20732725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20732725 is a deficient number, since it is larger than the sum of its proper divisors (6953871).

20732725 is a wasteful number, since it uses less digits than its factorization.

20732725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63816 (or 63811 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20732725 is about 4553.3202171602. The cubic root of 20732725 is about 274.7169539515.

The spelling of 20732725 in words is "twenty million, seven hundred thirty-two thousand, seven hundred twenty-five".