20733904 has 10 divisors (see below), whose sum is σ = 40171970. Its totient is φ = 10366944.

The previous prime is 20733901. The next prime is 20733907. The reversal of 20733904 is 40933702.

It is an interprime number because it is at equal distance from previous prime (20733901) and next prime (20733907).

It can be written as a sum of positive squares in only one way, i.e., 14077504 + 6656400 = 3752^2 + 2580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20733901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647919 + ... + 647950.

It is an arithmetic number, because the mean of its divisors is an integer number (4017197).

Almost surely, 2^20733904 is an apocalyptic number.

It is an amenable number.

20733904 is a deficient number, since it is larger than the sum of its proper divisors (19438066).

20733904 is a wasteful number, since it uses less digits than its factorization.

20733904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295877 (or 1295871 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20733904 is about 4553.4496812856. The cubic root of 20733904 is about 274.7221612610.

The spelling of 20733904 in words is "twenty million, seven hundred thirty-three thousand, nine hundred four".