21110994084 has 24 divisors (see below), whose sum is σ = 51400681920. Its totient is φ = 6731041504.

The previous prime is 21110994053. The next prime is 21110994101. The reversal of 21110994084 is 48049901112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38244279 + ... + 38244830.

It is an arithmetic number, because the mean of its divisors is an integer number (2141695080).

Almost surely, 2^21110994084 is an apocalyptic number.

It is an amenable number.

21110994084 is an abundant number, since it is smaller than the sum of its proper divisors (30289687836).

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

21110994084 is a wasteful number, since it uses less digits than its factorization.

21110994084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76489139 (or 76489137 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 21110994084 in words is "twenty-one billion, one hundred ten million, nine hundred ninety-four thousand, eighty-four".