21432203042 has 16 divisors (see below), whose sum is σ = 34200716832. Its totient is φ = 10037939520.

The previous prime is 21432203033. The next prime is 21432203063. The reversal of 21432203042 is 24030223412.

It is a super-3 number, since 3×21432203042³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21432202999 and 21432203017.

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, 1486568 + ... + 1500915.

It is an arithmetic number, because the mean of its divisors is an integer number (2137544802).

Almost surely, 2^21432203042 is an apocalyptic number.

21432203042 is a deficient number, since it is larger than the sum of its proper divisors (12768513790).

21432203042 is a wasteful number, since it uses less digits than its factorization.

21432203042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987713.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21432203042 its reverse (24030223412), we get a palindrome (45462426454).

The spelling of 21432203042 in words is "twenty-one billion, four hundred thirty-two million, two hundred three thousand, forty-two".