21710242532 has 18 divisors (see below), whose sum is σ = 41760818694. Its totient is φ = 9868291840.

The previous prime is 21710242529. The next prime is 21710242549. The reversal of 21710242532 is 23524201712.

It can be written as a sum of positive squares in only one way, i.e., 12138750976 + 9571491556 = 110176^2 + 97834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21710242495 and 21710242504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22427453 + ... + 22428420.

It is an arithmetic number, because the mean of its divisors is an integer number (2320045483).

Almost surely, 2^21710242532 is an apocalyptic number.

21710242532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21710242532 is a deficient number, since it is larger than the sum of its proper divisors (20050576162).

21710242532 is a wasteful number, since it uses less digits than its factorization.

21710242532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44855899 (or 44855886 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The spelling of 21710242532 in words is "twenty-one billion, seven hundred ten million, two hundred forty-two thousand, five hundred thirty-two".