22391987542 has 16 divisors (see below), whose sum is σ = 33799437360. Its totient is φ = 11125575072.

The previous prime is 22391987509. The next prime is 22391987551. The reversal of 22391987542 is 24578919322.

It is a happy number.

It is a super-2 number, since 2×22391987542² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22391987542.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 705184 + ... + 736252.

It is an arithmetic number, because the mean of its divisors is an integer number (2112464835).

Almost surely, 2^22391987542 is an apocalyptic number.

22391987542 is a deficient number, since it is larger than the sum of its proper divisors (11407449818).

22391987542 is a wasteful number, since it uses less digits than its factorization.

22391987542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33327.

The product of its digits is 2177280, while the sum is 52.

The spelling of 22391987542 in words is "twenty-two billion, three hundred ninety-one million, nine hundred eighty-seven thousand, five hundred forty-two".