21432302430 has 64 divisors (see below), whose sum is σ = 64129909248. Its totient is φ = 4453464960.

The previous prime is 21432302399. The next prime is 21432302431. The reversal of 21432302430 is 3420323412.

It is a self number, because there is not a number n which added to its sum of digits gives 21432302430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432302431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4636717 + ... + 4641336.

It is an arithmetic number, because the mean of its divisors is an integer number (1002029832).

Almost surely, 2^21432302430 is an apocalyptic number.

21432302430 is an abundant number, since it is smaller than the sum of its proper divisors (42697606818).

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

21432302430 is a wasteful number, since it uses less digits than its factorization.

21432302430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9278081.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21432302430 its reverse (3420323412), we get a palindrome (24852625842).

The spelling of 21432302430 in words is "twenty-one billion, four hundred thirty-two million, three hundred two thousand, four hundred thirty".