21233422438 has 16 divisors (see below), whose sum is σ = 31962565440. Its totient is φ = 10579297896.

The previous prime is 21233422373. The next prime is 21233422477. The reversal of 21233422438 is 83422433212.

It is a congruent 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, 674845 + ... + 705607.

It is an arithmetic number, because the mean of its divisors is an integer number (1997660340).

Almost surely, 2^21233422438 is an apocalyptic number.

21233422438 is a deficient number, since it is larger than the sum of its proper divisors (10729143002).

21233422438 is a wasteful number, since it uses less digits than its factorization.

21233422438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31971.

The product of its digits is 55296, while the sum is 34.

The spelling of 21233422438 in words is "twenty-one billion, two hundred thirty-three million, four hundred twenty-two thousand, four hundred thirty-eight".