21422514243 has 16 divisors (see below), whose sum is σ = 30805608960. Its totient is φ = 13163767584.

The previous prime is 21422514167. The next prime is 21422514251. The reversal of 21422514243 is 34241522412.

It is a happy number.

It is not a de Polignac number, because 21422514243 - 2¹² = 21422510147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21422514243.

It is not an unprimeable number, because it can be changed into a prime (21422515243) 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, 375483 + ... + 428756.

It is an arithmetic number, because the mean of its divisors is an integer number (1925350560).

Almost surely, 2^21422514243 is an apocalyptic number.

21422514243 is a deficient number, since it is larger than the sum of its proper divisors (9383094717).

21422514243 is a wasteful number, since it uses less digits than its factorization.

21422514243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804938.

The product of its digits is 15360, while the sum is 30.

The spelling of 21422514243 in words is "twenty-one billion, four hundred twenty-two million, five hundred fourteen thousand, two hundred forty-three".