21424624284 has 24 divisors (see below), whose sum is σ = 57132331648. Its totient is φ = 6121321200.

The previous prime is 21424624271. The next prime is 21424624297. The reversal of 21424624284 is 48242642412.

It is an interprime number because it is at equal distance from previous prime (21424624271) and next prime (21424624297).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127527442 + ... + 127527609.

Almost surely, 2^21424624284 is an apocalyptic number.

It is an amenable number.

21424624284 is an abundant number, since it is smaller than the sum of its proper divisors (35707707364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21424624284 is a wasteful number, since it uses less digits than its factorization.

21424624284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255055065 (or 255055063 counting only the distinct ones).

The product of its digits is 196608, while the sum is 39.

The spelling of 21424624284 in words is "twenty-one billion, four hundred twenty-four million, six hundred twenty-four thousand, two hundred eighty-four".