21233533242 has 16 divisors (see below), whose sum is σ = 42468867072. Its totient is φ = 7077544320.

The previous prime is 21233533219. The next prime is 21233533253. The reversal of 21233533242 is 24233533212.

It is a happy number.

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, 115498 + ... + 236234.

It is an arithmetic number, because the mean of its divisors is an integer number (2654304192).

Almost surely, 2^21233533242 is an apocalyptic number.

21233533242 is an abundant number, since it is smaller than the sum of its proper divisors (21235333830).

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

21233533242 is a wasteful number, since it uses less digits than its factorization.

21233533242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150053.

The product of its digits is 25920, while the sum is 30.

Subtracting from 21233533242 its sum of digits (30), we obtain a palindrome (21233533212).

The spelling of 21233533242 in words is "twenty-one billion, two hundred thirty-three million, five hundred thirty-three thousand, two hundred forty-two".