21744704417642 has 32 divisors (see below), whose sum is σ = 33477002334720. Its totient is φ = 10589428185840.

The previous prime is 21744704417629. The next prime is 21744704417647. The reversal of 21744704417642 is 24671440744712.

It is not an unprimeable number, because it can be changed into a prime (21744704417647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235237709 + ... + 235330127.

It is an arithmetic number, because the mean of its divisors is an integer number (1046156322960).

Almost surely, 2^{21744704417642} is an apocalyptic number.

21744704417642 is a deficient number, since it is larger than the sum of its proper divisors (11732297917078).

21744704417642 is a wasteful number, since it uses less digits than its factorization.

21744704417642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112538.

The product of its (nonzero) digits is 8429568, while the sum is 53.

The spelling of 21744704417642 in words is "twenty-one trillion, seven hundred forty-four billion, seven hundred four million, four hundred seventeen thousand, six hundred forty-two".