21424554430 has 16 divisors (see below), whose sum is σ = 38565890064. Its totient is φ = 8569445760.

The previous prime is 21424554421. The next prime is 21424554439. The reversal of 21424554430 is 3445542412.

It is an interprime number because it is at equal distance from previous prime (21424554421) and next prime (21424554439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424554439) by changing a digit.

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, 360745 + ... + 415915.

It is an arithmetic number, because the mean of its divisors is an integer number (2410368129).

Almost surely, 2^21424554430 is an apocalyptic number.

21424554430 is a deficient number, since it is larger than the sum of its proper divisors (17141335634).

21424554430 is a wasteful number, since it uses less digits than its factorization.

21424554430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94011.

The product of its (nonzero) digits is 76800, while the sum is 34.

The spelling of 21424554430 in words is "twenty-one billion, four hundred twenty-four million, five hundred fifty-four thousand, four hundred thirty".