20573444 has 12 divisors (see below), whose sum is σ = 36497244. Its totient is φ = 10145664.

The previous prime is 20573411. The next prime is 20573453. The reversal of 20573444 is 44437502.

It can be written as a sum of positive squares in 2 ways, for example, as 4251844 + 16321600 = 2062^2 + 4040^2 .

It is a super-2 number, since 2×20573444² = 846533196042272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34937 + ... + 35520.

It is an arithmetic number, because the mean of its divisors is an integer number (3041437).

Almost surely, 2^20573444 is an apocalyptic number.

It is an amenable number.

20573444 is a deficient number, since it is larger than the sum of its proper divisors (15923800).

20573444 is a wasteful number, since it uses less digits than its factorization.

20573444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70534 (or 70532 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 20573444 is about 4535.7958507852. The cubic root of 20573444 is about 274.0116321629.

The spelling of 20573444 in words is "twenty million, five hundred seventy-three thousand, four hundred forty-four".