21742556412364 has 12 divisors (see below), whose sum is σ = 39703798666224. Its totient is φ = 10398613936304.

The previous prime is 21742556412349. The next prime is 21742556412439. The reversal of 21742556412364 is 46321465524712.

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, 118166067367 + ... + 118166067550.

It is an arithmetic number, because the mean of its divisors is an integer number (3308649888852).

Almost surely, 2^{21742556412364} is an apocalyptic number.

It is an amenable number.

21742556412364 is a deficient number, since it is larger than the sum of its proper divisors (17961242253860).

21742556412364 is a wasteful number, since it uses less digits than its factorization.

21742556412364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236332134944 (or 236332134942 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 52.

The spelling of 21742556412364 in words is "twenty-one trillion, seven hundred forty-two billion, five hundred fifty-six million, four hundred twelve thousand, three hundred sixty-four".