21744041642723 has 8 divisors (see below), whose sum is σ = 22775706379008. Its totient is φ = 20719566208264.

The previous prime is 21744041642671. The next prime is 21744041642749. The reversal of 21744041642723 is 32724614044712.

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

It is a cyclic number.

It is not a de Polignac number, because 21744041642723 - 2⁸ = 21744041642467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21744041645723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797319265 + ... + 1797331362.

It is an arithmetic number, because the mean of its divisors is an integer number (2846963297376).

Almost surely, 2^{21744041642723} is an apocalyptic number.

21744041642723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21744041642723 is a deficient number, since it is larger than the sum of its proper divisors (1031664736285).

21744041642723 is a wasteful number, since it uses less digits than its factorization.

21744041642723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594650913.

The product of its (nonzero) digits is 1806336, while the sum is 47.

The spelling of 21744041642723 in words is "twenty-one trillion, seven hundred forty-four billion, forty-one million, six hundred forty-two thousand, seven hundred twenty-three".