21232202442 has 32 divisors (see below), whose sum is σ = 47109980160. Its totient is φ = 6324948720.

The previous prime is 21232202423. The next prime is 21232202491. The reversal of 21232202442 is 24420223212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2722378 + ... + 2730165.

It is an arithmetic number, because the mean of its divisors is an integer number (1472186880).

Almost surely, 2^21232202442 is an apocalyptic number.

21232202442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21232202442 is an abundant number, since it is smaller than the sum of its proper divisors (25877777718).

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

21232202442 is a wasteful number, since it uses less digits than its factorization.

21232202442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5452618.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21232202442 its reverse (24420223212), we get a palindrome (45652425654).

The spelling of 21232202442 in words is "twenty-one billion, two hundred thirty-two million, two hundred two thousand, four hundred forty-two".