20925443 has 16 divisors (see below), whose sum is σ = 26991360. Its totient is φ = 15741600.

The previous prime is 20925439. The next prime is 20925467. The reversal of 20925443 is 34452902.

It is not a de Polignac number, because 20925443 - 2² = 20925439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (20925433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2453 + ... + 6918.

It is an arithmetic number, because the mean of its divisors is an integer number (1686960).

Almost surely, 2^20925443 is an apocalyptic number.

20925443 is a deficient number, since it is larger than the sum of its proper divisors (6065917).

20925443 is a wasteful number, since it uses less digits than its factorization.

20925443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9418.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20925443 is about 4574.4336261443. The cubic root of 20925443 is about 275.5655271267.

It can be divided in two parts, 209 and 25443, that added together give a palindrome (25652).

The spelling of 20925443 in words is "twenty million, nine hundred twenty-five thousand, four hundred forty-three".