20624443 has 12 divisors (see below), whose sum is σ = 25255560. Its totient is φ = 16746912.

The previous prime is 20624381. The next prime is 20624447. The reversal of 20624443 is 34442602.

It is not a de Polignac number, because 20624443 - 2⁹ = 20623931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20624447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10146 + ... + 12007.

It is an arithmetic number, because the mean of its divisors is an integer number (2104630).

Almost surely, 2^20624443 is an apocalyptic number.

20624443 is a deficient number, since it is larger than the sum of its proper divisors (4631117).

20624443 is a wasteful number, since it uses less digits than its factorization.

20624443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22186 (or 22179 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 20624443 is about 4541.4142070505. The cubic root of 20624443 is about 274.2378588824.

It can be divided in two parts, 206 and 24443, that added together give a square (24649 = 157²).

The spelling of 20624443 in words is "twenty million, six hundred twenty-four thousand, four hundred forty-three".