21742743619682 has 8 divisors (see below), whose sum is σ = 32616084098496. Its totient is φ = 10870715586852.

The previous prime is 21742743619643. The next prime is 21742743619697. The reversal of 21742743619682 is 28691634724712.

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

It is a super-2 number, since 2×21742743619682² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328070078 + ... + 328136345.

It is an arithmetic number, because the mean of its divisors is an integer number (4077010512312).

Almost surely, 2^{21742743619682} is an apocalyptic number.

21742743619682 is a deficient number, since it is larger than the sum of its proper divisors (10873340478814).

21742743619682 is a wasteful number, since it uses less digits than its factorization.

21742743619682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656222992.

The product of its digits is 48771072, while the sum is 62.

The spelling of 21742743619682 in words is "twenty-one trillion, seven hundred forty-two billion, seven hundred forty-three million, six hundred nineteen thousand, six hundred eighty-two".