20756468 has 6 divisors (see below), whose sum is σ = 36323826. Its totient is φ = 10378232.

The previous prime is 20756447. The next prime is 20756479. The reversal of 20756468 is 86465702.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12588304 + 8168164 = 3548^2 + 2858^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2594555 + ... + 2594562.

It is an arithmetic number, because the mean of its divisors is an integer number (6053971).

Almost surely, 2^20756468 is an apocalyptic number.

It is an amenable number.

20756468 is a deficient number, since it is larger than the sum of its proper divisors (15567358).

20756468 is a wasteful number, since it uses less digits than its factorization.

20756468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5189121 (or 5189119 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 20756468 is about 4555.9266894892. The cubic root of 20756468 is about 274.8217820487.

The spelling of 20756468 in words is "twenty million, seven hundred fifty-six thousand, four hundred sixty-eight".