21432413402 has 32 divisors (see below), whose sum is σ = 35065785600. Its totient is φ = 9785821248.

The previous prime is 21432413399. The next prime is 21432413407. The reversal of 21432413402 is 20431423412.

It is not an unprimeable number, because it can be changed into a prime (21432413407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659663 + ... + 691389.

It is an arithmetic number, because the mean of its divisors is an integer number (1095805800).

Almost surely, 2^21432413402 is an apocalyptic number.

21432413402 is a deficient number, since it is larger than the sum of its proper divisors (13633372198).

21432413402 is a wasteful number, since it uses less digits than its factorization.

21432413402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32390.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21432413402 its reverse (20431423412), we get a palindrome (41863836814).

The spelling of 21432413402 in words is "twenty-one billion, four hundred thirty-two million, four hundred thirteen thousand, four hundred two".