20772824 has 8 divisors (see below), whose sum is σ = 38949060. Its totient is φ = 10386408.

The previous prime is 20772811. The next prime is 20772847. The reversal of 20772824 is 42827702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1298294 + ... + 1298309.

Almost surely, 2^20772824 is an apocalyptic number.

It is an amenable number.

20772824 is a deficient number, since it is larger than the sum of its proper divisors (18176236).

20772824 is a wasteful number, since it uses less digits than its factorization.

20772824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596609 (or 2596605 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 20772824 is about 4557.7213605046. The cubic root of 20772824 is about 274.8939491905.

The spelling of 20772824 in words is "twenty million, seven hundred seventy-two thousand, eight hundred twenty-four".