20677072 has 20 divisors (see below), whose sum is σ = 43143940. Its totient is φ = 9543168.

The previous prime is 20677067. The next prime is 20677091. The reversal of 20677072 is 27077602.

It can be written as a sum of positive squares in 2 ways, for example, as 7974976 + 12702096 = 2824^2 + 3564^2 .

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 49497 + ... + 49912.

It is an arithmetic number, because the mean of its divisors is an integer number (2157197).

Almost surely, 2^20677072 is an apocalyptic number.

It is an amenable number.

20677072 is an abundant number, since it is smaller than the sum of its proper divisors (22466868).

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

20677072 is a wasteful number, since it uses less digits than its factorization.

20677072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99430 (or 99424 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 20677072 is about 4547.2048557328. The cubic root of 20677072 is about 274.4709254621.

The spelling of 20677072 in words is "twenty million, six hundred seventy-seven thousand, seventy-two".