21334772943 has 48 divisors (see below), whose sum is σ = 34086474240. Its totient is φ = 12750566400.

The previous prime is 21334772941. The next prime is 21334772981. The reversal of 21334772943 is 34927743312.

21334772943 is a `hidden beast` number, since 2 + 13 + 347 + 7 + 294 + 3 = 666.

It is not a de Polignac number, because 21334772943 - 2¹ = 21334772941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334772941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10095855 + ... + 10097967.

It is an arithmetic number, because the mean of its divisors is an integer number (710134880).

Almost surely, 2^21334772943 is an apocalyptic number.

21334772943 is a deficient number, since it is larger than the sum of its proper divisors (12751701297).

21334772943 is a wasteful number, since it uses less digits than its factorization.

21334772943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500 (or 3497 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The spelling of 21334772943 in words is "twenty-one billion, three hundred thirty-four million, seven hundred seventy-two thousand, nine hundred forty-three".