21854325 has 24 divisors (see below), whose sum is σ = 36330016. Its totient is φ = 11592000.

The previous prime is 21854317. The next prime is 21854341. The reversal of 21854325 is 52345812.

It is not a de Polignac number, because 21854325 - 2³ = 21854317 is a prime.

It is a super-2 number, since 2×21854325² = 955223042411250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

Its product of digits (9600) is a multiple of the sum of its prime divisors (1600).

It is a junction number, because it is equal to n+sod(n) for n = 21854292 and 21854301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15135 + ... + 16515.

Almost surely, 2^21854325 is an apocalyptic number.

21854325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21854325 is a deficient number, since it is larger than the sum of its proper divisors (14475691).

21854325 is a wasteful number, since it uses less digits than its factorization.

21854325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1600 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 21854325 is about 4674.8609604993. The cubic root of 21854325 is about 279.5840976750.

The spelling of 21854325 in words is "twenty-one million, eight hundred fifty-four thousand, three hundred twenty-five".