21742023722 has 16 divisors (see below), whose sum is σ = 34389878400. Its totient is φ = 10280743200.

The previous prime is 21742023697. The next prime is 21742023733. The reversal of 21742023722 is 22732024712.

It is a super-3 number, since 3×21742023722³ (a number of 32 digits) contains 333 as substring.

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, 481154 + ... + 524397.

It is an arithmetic number, because the mean of its divisors is an integer number (2149367400).

Almost surely, 2^21742023722 is an apocalyptic number.

21742023722 is a deficient number, since it is larger than the sum of its proper divisors (12647854678).

21742023722 is a wasteful number, since it uses less digits than its factorization.

21742023722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006141.

The product of its (nonzero) digits is 18816, while the sum is 32.

It can be divided in two parts, 217420 and 23722, that added together give a palindrome (241142).

The spelling of 21742023722 in words is "twenty-one billion, seven hundred forty-two million, twenty-three thousand, seven hundred twenty-two".