21929852934 has 144 divisors (see below), whose sum is σ = 55272672000. Its totient is φ = 6261662880.

The previous prime is 21929852927. The next prime is 21929852969. The reversal of 21929852934 is 43925892912.

21929852934 is a `hidden beast` number, since 21 + 9 + 2 + 98 + 529 + 3 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8233687 + ... + 8236349.

It is an arithmetic number, because the mean of its divisors is an integer number (383838000).

Almost surely, 2^21929852934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21929852934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27636336000).

21929852934 is an abundant number, since it is smaller than the sum of its proper divisors (33342819066).

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

21929852934 is a wasteful number, since it uses less digits than its factorization.

21929852934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2897 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 21929852934 in words is "twenty-one billion, nine hundred twenty-nine million, eight hundred fifty-two thousand, nine hundred thirty-four".