21442312502140 has 24 divisors (see below), whose sum is σ = 45792057210480. Its totient is φ = 8431553390208.

The previous prime is 21442312502137. The next prime is 21442312502141. The reversal of 21442312502140 is 4120521324412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442312502141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9085724457 + ... + 9085726816.

It is an arithmetic number, because the mean of its divisors is an integer number (1908002383770).

Almost surely, 2^{21442312502140} is an apocalyptic number.

21442312502140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21442312502140 is an abundant number, since it is smaller than the sum of its proper divisors (24349744708340).

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

21442312502140 is a wasteful number, since it uses less digits than its factorization.

21442312502140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18171451341 (or 18171451339 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 21442312502140 its reverse (4120521324412), we get a palindrome (25562833826552).

The spelling of 21442312502140 in words is "twenty-one trillion, four hundred forty-two billion, three hundred twelve million, five hundred two thousand, one hundred forty".