21352841722 has 16 divisors (see below), whose sum is σ = 32193806112. Its totient is φ = 10621613520.

The previous prime is 21352841717. The next prime is 21352841737. The reversal of 21352841722 is 22714825312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241848 + ... + 1258924.

It is an arithmetic number, because the mean of its divisors is an integer number (2012112882).

Almost surely, 2^21352841722 is an apocalyptic number.

21352841722 is a deficient number, since it is larger than the sum of its proper divisors (10840964390).

21352841722 is a wasteful number, since it uses less digits than its factorization.

21352841722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20253.

The product of its digits is 53760, while the sum is 37.

The spelling of 21352841722 in words is "twenty-one billion, three hundred fifty-two million, eight hundred forty-one thousand, seven hundred twenty-two".