21329911110 has 32 divisors (see below), whose sum is σ = 51405995520. Its totient is φ = 5664175328.

The previous prime is 21329911063. The next prime is 21329911121. The reversal of 21329911110 is 1111992312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1480272 + ... + 1494611.

It is an arithmetic number, because the mean of its divisors is an integer number (1606437360).

Almost surely, 2^21329911110 is an apocalyptic number.

21329911110 is an abundant number, since it is smaller than the sum of its proper divisors (30076084410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21329911110 is a wasteful number, since it uses less digits than its factorization.

21329911110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975132.

The product of its (nonzero) digits is 972, while the sum is 30.

The spelling of 21329911110 in words is "twenty-one billion, three hundred twenty-nine million, nine hundred eleven thousand, one hundred ten".