21900265 has 8 divisors (see below), whose sum is σ = 26320320. Its totient is φ = 17493552.

The previous prime is 21900259. The next prime is 21900271. The reversal of 21900265 is 56200912.

It is an interprime number because it is at equal distance from previous prime (21900259) and next prime (21900271).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21900265 - 2¹⁵ = 21867497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732 + ... + 6658.

It is an arithmetic number, because the mean of its divisors is an integer number (3290040).

Almost surely, 2^21900265 is an apocalyptic number.

It is an amenable number.

21900265 is a deficient number, since it is larger than the sum of its proper divisors (4420055).

21900265 is an equidigital number, since it uses as much as digits as its factorization.

21900265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21900265 is about 4679.7718961505. The cubic root of 21900265 is about 279.7798652417.

The spelling of 21900265 in words is "twenty-one million, nine hundred thousand, two hundred sixty-five".