22540213442 has 8 divisors (see below), whose sum is σ = 33813108300. Its totient is φ = 11269177344.

The previous prime is 22540213393. The next prime is 22540213447. The reversal of 22540213442 is 24431204522.

It can be written as a sum of positive squares in 2 ways, for example, as 19658563681 + 2881649761 = 140209^2 + 53681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22540213442² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22540213447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433967 + ... + 483122.

Almost surely, 2^22540213442 is an apocalyptic number.

22540213442 is a deficient number, since it is larger than the sum of its proper divisors (11272894858).

22540213442 is a wasteful number, since it uses less digits than its factorization.

22540213442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929380.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 22540213442 its reverse (24431204522), we get a palindrome (46971417964).

The spelling of 22540213442 in words is "twenty-two billion, five hundred forty million, two hundred thirteen thousand, four hundred forty-two".