21921038334 has 36 divisors (see below), whose sum is σ = 51430135536. Its totient is φ = 6744933936.

The previous prime is 21921038281. The next prime is 21921038351. The reversal of 21921038334 is 43383012912.

21921038334 is a `hidden beast` number, since 219 + 2 + 103 + 8 + 334 = 666.

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 17 ways as a sum of consecutive naturals, for example, 3600022 + ... + 3606105.

It is an arithmetic number, because the mean of its divisors is an integer number (1428614876).

Almost surely, 2^21921038334 is an apocalyptic number.

21921038334 is an abundant number, since it is smaller than the sum of its proper divisors (29509097202).

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

21921038334 is a wasteful number, since it uses less digits than its factorization.

21921038334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206161 (or 7206145 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 21921038334 in words is "twenty-one billion, nine hundred twenty-one million, thirty-eight thousand, three hundred thirty-four".