21892485 has 16 divisors (see below), whose sum is σ = 35086464. Its totient is φ = 11656512.

The previous prime is 21892469. The next prime is 21892499. The reversal of 21892485 is 58429812.

It is not a de Polignac number, because 21892485 - 2⁴ = 21892469 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15259 + ... + 16631.

It is an arithmetic number, because the mean of its divisors is an integer number (2192904).

Almost surely, 2^21892485 is an apocalyptic number.

It is an amenable number.

21892485 is a deficient number, since it is larger than the sum of its proper divisors (13193979).

21892485 is a wasteful number, since it uses less digits than its factorization.

21892485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444.

The product of its digits is 46080, while the sum is 39.

The square root of 21892485 is about 4678.9405852180. The cubic root of 21892485 is about 279.7467310132.

The spelling of 21892485 in words is "twenty-one million, eight hundred ninety-two thousand, four hundred eighty-five".