21442432012 has 24 divisors (see below), whose sum is σ = 37778397552. Its totient is φ = 10648780800.

The previous prime is 21442432001. The next prime is 21442432021. The reversal of 21442432012 is 21023424412.

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, 473187 + ... + 516517.

It is an arithmetic number, because the mean of its divisors is an integer number (1574099898).

Almost surely, 2^21442432012 is an apocalyptic number.

It is an amenable number.

21442432012 is a deficient number, since it is larger than the sum of its proper divisors (16335965540).

21442432012 is a wasteful number, since it uses less digits than its factorization.

21442432012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44169 (or 44167 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21442432012 its reverse (21023424412), we get a palindrome (42465856424).

The spelling of 21442432012 in words is "twenty-one billion, four hundred forty-two million, four hundred thirty-two thousand, twelve".