20747752 has 32 divisors (see below), whose sum is σ = 41401800. Its totient is φ = 9713664.

The previous prime is 20747737. The next prime is 20747767. The reversal of 20747752 is 25774702.

It is an interprime number because it is at equal distance from previous prime (20747737) and next prime (20747767).

It can be written as a sum of positive squares in 4 ways, for example, as 20738916 + 8836 = 4554^2 + 94^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50524 + ... + 50932.

Almost surely, 2^20747752 is an apocalyptic number.

It is an amenable number.

20747752 is a deficient number, since it is larger than the sum of its proper divisors (20654048).

20747752 is a wasteful number, since it uses less digits than its factorization.

20747752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 20747752 is about 4554.9700328323. The cubic root of 20747752 is about 274.7833091895.

The spelling of 20747752 in words is "twenty million, seven hundred forty-seven thousand, seven hundred fifty-two".