21894795 has 36 divisors (see below), whose sum is σ = 41109120. Its totient is φ = 10775232.

The previous prime is 21894751. The next prime is 21894839. The reversal of 21894795 is 59749812.

It is an interprime number because it is at equal distance from previous prime (21894751) and next prime (21894839).

It is not a de Polignac number, because 21894795 - 2⁷ = 21894667 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21894795.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6166 + ... + 9044.

It is an arithmetic number, because the mean of its divisors is an integer number (1141920).

Almost surely, 2^21894795 is an apocalyptic number.

21894795 is a deficient number, since it is larger than the sum of its proper divisors (19214325).

21894795 is a wasteful number, since it uses less digits than its factorization.

21894795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916 (or 2900 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 21894795 is about 4679.1874294582. The cubic root of 21894795 is about 279.7565698874.

The spelling of 21894795 in words is "twenty-one million, eight hundred ninety-four thousand, seven hundred ninety-five".