21432301420 has 24 divisors (see below), whose sum is σ = 45010582848. Its totient is φ = 8572396800.

The previous prime is 21432301381. The next prime is 21432301447. The reversal of 21432301420 is 2410323412.

It is a junction number, because it is equal to n+sod(n) for n = 21432301391 and 21432301400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634765 + ... + 667675.

It is an arithmetic number, because the mean of its divisors is an integer number (1875440952).

Almost surely, 2^21432301420 is an apocalyptic number.

21432301420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21432301420 is an abundant number, since it is smaller than the sum of its proper divisors (23578281428).

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

21432301420 is a wasteful number, since it uses less digits than its factorization.

21432301420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65481 (or 65479 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21432301420 its reverse (2410323412), we get a palindrome (23842624832).

The spelling of 21432301420 in words is "twenty-one billion, four hundred thirty-two million, three hundred one thousand, four hundred twenty".