21622894893 has 16 divisors (see below), whose sum is σ = 32049177600. Its totient is φ = 14408396640.

The previous prime is 21622894883. The next prime is 21622894927. The reversal of 21622894893 is 39849822612.

21622894893 is a `hidden beast` number, since 2 + 1 + 622 + 8 + 9 + 4 + 8 + 9 + 3 = 666.

It is not a de Polignac number, because 21622894893 - 2⁴ = 21622894877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622894883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132688 + ... + 246681.

It is an arithmetic number, because the mean of its divisors is an integer number (2003073600).

Almost surely, 2^21622894893 is an apocalyptic number.

It is an amenable number.

21622894893 is a deficient number, since it is larger than the sum of its proper divisors (10426282707).

21622894893 is a wasteful number, since it uses less digits than its factorization.

21622894893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381489 (or 381483 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 21622894893 in words is "twenty-one billion, six hundred twenty-two million, eight hundred ninety-four thousand, eight hundred ninety-three".