22431340 has 24 divisors (see below), whose sum is σ = 47567520. Its totient is φ = 8884608.

The previous prime is 22431329. The next prime is 22431359. The reversal of 22431340 is 4313422.

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, 3385 + ... + 7504.

It is an arithmetic number, because the mean of its divisors is an integer number (1981980).

Almost surely, 2^22431340 is an apocalyptic number.

22431340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22431340 is an abundant number, since it is smaller than the sum of its proper divisors (25136180).

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

22431340 is a wasteful number, since it uses less digits than its factorization.

22431340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001 (or 10999 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 22431340 is about 4736.1735610089. The cubic root of 22431340 is about 282.0233536986.

Adding to 22431340 its reverse (4313422), we get a palindrome (26744762).

It can be divided in two parts, 2 and 2431340, that added together give a palindrome (2431342).

The spelling of 22431340 in words is "twenty-two million, four hundred thirty-one thousand, three hundred forty".