21883425 has 12 divisors (see below), whose sum is σ = 36180720. Its totient is φ = 11671120.

The previous prime is 21883423. The next prime is 21883439. The reversal of 21883425 is 52438812.

It is not a de Polignac number, because 21883425 - 2¹ = 21883423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21883423) 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, 145815 + ... + 145964.

It is an arithmetic number, because the mean of its divisors is an integer number (3015060).

Almost surely, 2^21883425 is an apocalyptic number.

21883425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21883425 is a deficient number, since it is larger than the sum of its proper divisors (14297295).

21883425 is a wasteful number, since it uses less digits than its factorization.

21883425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291792 (or 291787 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 21883425 is about 4677.9723171477. The cubic root of 21883425 is about 279.7081354998.

The spelling of 21883425 in words is "twenty-one million, eight hundred eighty-three thousand, four hundred twenty-five".