21924956894 has 16 divisors (see below), whose sum is σ = 34156608000. Its totient is φ = 10543760280.

The previous prime is 21924956891. The next prime is 21924956897. The reversal of 21924956894 is 49865942912.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21924956891) and next prime (21924956897).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21924956891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074644 + ... + 1094855.

It is an arithmetic number, because the mean of its divisors is an integer number (2134788000).

Almost surely, 2^21924956894 is an apocalyptic number.

21924956894 is a deficient number, since it is larger than the sum of its proper divisors (12231651106).

21924956894 is a wasteful number, since it uses less digits than its factorization.

21924956894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169695.

The product of its digits is 11197440, while the sum is 59.

The spelling of 21924956894 in words is "twenty-one billion, nine hundred twenty-four million, nine hundred fifty-six thousand, eight hundred ninety-four".