20752461 has 12 divisors (see below), whose sum is σ = 31739292. Its totient is φ = 13021056.

The previous prime is 20752453. The next prime is 20752469. The reversal of 20752461 is 16425702.

It is an interprime number because it is at equal distance from previous prime (20752453) and next prime (20752469).

It can be written as a sum of positive squares in 2 ways, for example, as 18224361 + 2528100 = 4269^2 + 1590^2 .

It is not a de Polignac number, because 20752461 - 2³ = 20752453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20752469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67666 + ... + 67971.

It is an arithmetic number, because the mean of its divisors is an integer number (2644941).

Almost surely, 2^20752461 is an apocalyptic number.

It is an amenable number.

20752461 is a deficient number, since it is larger than the sum of its proper divisors (10986831).

20752461 is a wasteful number, since it uses less digits than its factorization.

20752461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135660 (or 135657 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20752461 is about 4555.4869114069. The cubic root of 20752461 is about 274.8040962885.

The spelling of 20752461 in words is "twenty million, seven hundred fifty-two thousand, four hundred sixty-one".