21914790912 has 396 divisors, whose sum is σ = 76405928976. Its totient is φ = 5925519360.

The previous prime is 21914790889. The next prime is 21914790923. The reversal of 21914790912 is 21909741912.

It is a happy number.

21914790912 is a `hidden beast` number, since 2 + 1 + 91 + 479 + 0 + 91 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23288362 + ... + 23289302.

Almost surely, 2^21914790912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21914790912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38202964488).

21914790912 is an abundant number, since it is smaller than the sum of its proper divisors (54491138064).

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

21914790912 is a wasteful number, since it uses less digits than its factorization.

21914790912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 21914790912 in words is "twenty-one billion, nine hundred fourteen million, seven hundred ninety thousand, nine hundred twelve".