21706832344 has 32 divisors (see below), whose sum is σ = 41326951680. Its totient is φ = 10687528864.

The previous prime is 21706832339. The next prime is 21706832351. The reversal of 21706832344 is 44323860712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21706832297 and 21706832306.

It is a congruent number.

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, 67029 + ... + 218875.

It is an arithmetic number, because the mean of its divisors is an integer number (1291467240).

Almost surely, 2^21706832344 is an apocalyptic number.

It is an amenable number.

21706832344 is a deficient number, since it is larger than the sum of its proper divisors (19620119336).

21706832344 is a wasteful number, since it uses less digits than its factorization.

21706832344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152127 (or 152123 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 21706832344 in words is "twenty-one billion, seven hundred six million, eight hundred thirty-two thousand, three hundred forty-four".