20756612 has 6 divisors (see below), whose sum is σ = 36324078. Its totient is φ = 10378304.

The previous prime is 20756599. The next prime is 20756621. The reversal of 20756612 is 21665702.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 470596 = 4504^2 + 686^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2594573 + ... + 2594580.

It is an arithmetic number, because the mean of its divisors is an integer number (6054013).

Almost surely, 2^20756612 is an apocalyptic number.

It is an amenable number.

20756612 is a deficient number, since it is larger than the sum of its proper divisors (15567466).

20756612 is a wasteful number, since it uses less digits than its factorization.

20756612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5189157 (or 5189155 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20756612 is about 4555.9424930523. The cubic root of 20756612 is about 274.8224175815.

The spelling of 20756612 in words is "twenty million, seven hundred fifty-six thousand, six hundred twelve".