21924152457443 has 4 divisors (see below), whose sum is σ = 21925910198808. Its totient is φ = 21922394716080.

The previous prime is 21924152457421. The next prime is 21924152457517. The reversal of 21924152457443 is 34475425142912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21924152457443 - 2⁸ = 21924152457187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21924152457743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878851973 + ... + 878876918.

It is an arithmetic number, because the mean of its divisors is an integer number (5481477549702).

Almost surely, 2^{21924152457443} is an apocalyptic number.

21924152457443 is a deficient number, since it is larger than the sum of its proper divisors (1757741365).

21924152457443 is a wasteful number, since it uses less digits than its factorization.

21924152457443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757741364.

The product of its digits is 9676800, while the sum is 53.

The spelling of 21924152457443 in words is "twenty-one trillion, nine hundred twenty-four billion, one hundred fifty-two million, four hundred fifty-seven thousand, four hundred forty-three".