20748444 has 12 divisors (see below), whose sum is σ = 48413064. Its totient is φ = 6916144.

The previous prime is 20748443. The next prime is 20748451. The reversal of 20748444 is 44484702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20748444² = 860995856842272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20748443) 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, 864507 + ... + 864530.

It is an arithmetic number, because the mean of its divisors is an integer number (4034422).

Almost surely, 2^20748444 is an apocalyptic number.

It is an amenable number.

20748444 is an abundant number, since it is smaller than the sum of its proper divisors (27664620).

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

20748444 is a wasteful number, since it uses less digits than its factorization.

20748444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729044 (or 1729042 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 33.

The square root of 20748444 is about 4555.0459931816. The cubic root of 20748444 is about 274.7863641058.

The spelling of 20748444 in words is "twenty million, seven hundred forty-eight thousand, four hundred forty-four".