22042321506 has 24 divisors (see below), whose sum is σ = 49527192624. Its totient is φ = 7347440340.

The previous prime is 22042321501. The next prime is 22042321517. The reversal of 22042321506 is 60512324022.

It is a happy number.

22042321506 is a `hidden beast` number, since 2 + 20 + 423 + 215 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22042321506.

It is not an unprimeable number, because it can be changed into a prime (22042321501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22676800 + ... + 22677771.

It is an arithmetic number, because the mean of its divisors is an integer number (2063633026).

Almost surely, 2^22042321506 is an apocalyptic number.

22042321506 is an abundant number, since it is smaller than the sum of its proper divisors (27484871118).

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

22042321506 is an equidigital number, since it uses as much as digits as its factorization.

22042321506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45354588 (or 45354576 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 22042321506 its reverse (60512324022), we get a palindrome (82554645528).

The spelling of 22042321506 in words is "twenty-two billion, forty-two million, three hundred twenty-one thousand, five hundred six".