20776572 has 36 divisors (see below), whose sum is σ = 54215616. Its totient is φ = 6701760.

The previous prime is 20776571. The next prime is 20776579. The reversal of 20776572 is 27567702.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20776571) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8193 + ... + 10424.

Almost surely, 2^20776572 is an apocalyptic number.

It is an amenable number.

20776572 is an abundant number, since it is smaller than the sum of its proper divisors (33439044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20776572 is a wasteful number, since it uses less digits than its factorization.

20776572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18658 (or 18653 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 20776572 is about 4558.1325123344. The cubic root of 20776572 is about 274.9104810555.

It can be divided in two parts, 2077 and 6572, that added together give a square (8649 = 93²).

The spelling of 20776572 in words is "twenty million, seven hundred seventy-six thousand, five hundred seventy-two".