20875744 has 24 divisors (see below), whose sum is σ = 41217120. Its totient is φ = 10407936.

The previous prime is 20875721. The next prime is 20875747. The reversal of 20875744 is 44757802.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14112 + ... + 15520.

It is an arithmetic number, because the mean of its divisors is an integer number (1717380).

Almost surely, 2^20875744 is an apocalyptic number.

It is an amenable number.

20875744 is a deficient number, since it is larger than the sum of its proper divisors (20341376).

20875744 is a wasteful number, since it uses less digits than its factorization.

20875744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 1874 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 20875744 is about 4568.9981396363. The cubic root of 20875744 is about 275.3471934323.

The spelling of 20875744 in words is "twenty million, eight hundred seventy-five thousand, seven hundred forty-four".