21122933742 has 24 divisors (see below), whose sum is σ = 45793875816. Its totient is φ = 7036744176.

The previous prime is 21122933723. The next prime is 21122933743. The reversal of 21122933742 is 24733922112.

It is a junction number, because it is equal to n+sod(n) for n = 21122933697 and 21122933706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122933743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321973 + ... + 381984.

It is an arithmetic number, because the mean of its divisors is an integer number (1908078159).

Almost surely, 2^21122933742 is an apocalyptic number.

21122933742 is an abundant number, since it is smaller than the sum of its proper divisors (24670942074).

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

21122933742 is a wasteful number, since it uses less digits than its factorization.

21122933742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705632 (or 705629 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The spelling of 21122933742 in words is "twenty-one billion, one hundred twenty-two million, nine hundred thirty-three thousand, seven hundred forty-two".