21244022343 has 12 divisors (see below), whose sum is σ = 30795015888. Its totient is φ = 14112278880.

The previous prime is 21244022323. The next prime is 21244022347. The reversal of 21244022343 is 34322044212.

21244022343 is a `hidden beast` number, since 2 + 1 + 24 + 402 + 234 + 3 = 666.

It is not a de Polignac number, because 21244022343 - 2⁸ = 21244022087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244022347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4197555 + ... + 4202612.

It is an arithmetic number, because the mean of its divisors is an integer number (2566251324).

Almost surely, 2^21244022343 is an apocalyptic number.

21244022343 is a deficient number, since it is larger than the sum of its proper divisors (9550993545).

21244022343 is a wasteful number, since it uses less digits than its factorization.

21244022343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400454 (or 8400451 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21244022343 its reverse (34322044212), we get a palindrome (55566066555).

The spelling of 21244022343 in words is "twenty-one billion, two hundred forty-four million, twenty-two thousand, three hundred forty-three".