21432140412 has 96 divisors (see below), whose sum is σ = 51864986880. Its totient is φ = 6883729920.

The previous prime is 21432140381. The next prime is 21432140447. The reversal of 21432140412 is 21404123412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14354338 + ... + 14355830.

It is an arithmetic number, because the mean of its divisors is an integer number (540260280).

Almost surely, 2^21432140412 is an apocalyptic number.

It is an amenable number.

21432140412 is an abundant number, since it is smaller than the sum of its proper divisors (30432846468).

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

21432140412 is a wasteful number, since it uses less digits than its factorization.

21432140412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1881 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21432140412 its reverse (21404123412), we get a palindrome (42836263824).

The spelling of 21432140412 in words is "twenty-one billion, four hundred thirty-two million, one hundred forty thousand, four hundred twelve".