21743247574454 has 16 divisors (see below), whose sum is σ = 37905903763200. Its totient is φ = 9160593408744.

The previous prime is 21743247574441. The next prime is 21743247574459. The reversal of 21743247574454 is 45447574234712.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a junction number, because it is equal to n+sod(n) for n = 21743247574393 and 21743247574402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21743247574459) 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, 13161771314 + ... + 13161772965.

It is an arithmetic number, because the mean of its divisors is an integer number (2369118985200).

Almost surely, 2^{21743247574454} is an apocalyptic number.

21743247574454 is a deficient number, since it is larger than the sum of its proper divisors (16162656188746).

21743247574454 is a wasteful number, since it uses less digits than its factorization.

21743247574454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26323544347.

The product of its digits is 105369600, while the sum is 59.

The spelling of 21743247574454 in words is "twenty-one trillion, seven hundred forty-three billion, two hundred forty-seven million, five hundred seventy-four thousand, four hundred fifty-four".