21424513153 has 4 divisors (see below), whose sum is σ = 21555952048. Its totient is φ = 21293074260.

The previous prime is 21424513127. The next prime is 21424513181. The reversal of 21424513153 is 35131542412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21424513153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21424513853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65719203 + ... + 65719528.

It is an arithmetic number, because the mean of its divisors is an integer number (5388988012).

Almost surely, 2^21424513153 is an apocalyptic number.

It is an amenable number.

21424513153 is a deficient number, since it is larger than the sum of its proper divisors (131438895).

21424513153 is a wasteful number, since it uses less digits than its factorization.

21424513153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131438894.

The product of its digits is 14400, while the sum is 31.

The spelling of 21424513153 in words is "twenty-one billion, four hundred twenty-four million, five hundred thirteen thousand, one hundred fifty-three".