21994899910 has 16 divisors (see below), whose sum is σ = 39875648400. Its totient is φ = 8734664736.

The previous prime is 21994899907. The next prime is 21994899911. The reversal of 21994899910 is 1999849912.

21994899910 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21994899911) 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, 7910445 + ... + 7913224.

It is an arithmetic number, because the mean of its divisors is an integer number (2492228025).

Almost surely, 2^21994899910 is an apocalyptic number.

21994899910 is a deficient number, since it is larger than the sum of its proper divisors (17880748490).

21994899910 is a wasteful number, since it uses less digits than its factorization.

21994899910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15823815.

The product of its (nonzero) digits is 3779136, while the sum is 61.

The spelling of 21994899910 in words is "twenty-one billion, nine hundred ninety-four million, eight hundred ninety-nine thousand, nine hundred ten".