21742610674 has 8 divisors (see below), whose sum is σ = 32614556508. Its totient is φ = 10871091840.

The previous prime is 21742610671. The next prime is 21742610711. The reversal of 21742610674 is 47601624712.

It can be written as a sum of positive squares in 2 ways, for example, as 20475606649 + 1267004025 = 143093^2 + 35595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21742610674² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21742610671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102894 + ... + 232534.

Almost surely, 2^21742610674 is an apocalyptic number.

21742610674 is a deficient number, since it is larger than the sum of its proper divisors (10871945834).

21742610674 is a wasteful number, since it uses less digits than its factorization.

21742610674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213500.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 21742610674 in words is "twenty-one billion, seven hundred forty-two million, six hundred ten thousand, six hundred seventy-four".