21113242340 has 48 divisors (see below), whose sum is σ = 45125942400. Its totient is φ = 8295885312.

The previous prime is 21113242333. The next prime is 21113242351. The reversal of 21113242340 is 4324231112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459116 + ... + 503004.

It is an arithmetic number, because the mean of its divisors is an integer number (940123800).

Almost surely, 2^21113242340 is an apocalyptic number.

21113242340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113242340 is an abundant number, since it is smaller than the sum of its proper divisors (24012700060).

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

21113242340 is a wasteful number, since it uses less digits than its factorization.

21113242340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44324 (or 44322 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21113242340 its reverse (4324231112), we get a palindrome (25437473452).

The spelling of 21113242340 in words is "twenty-one billion, one hundred thirteen million, two hundred forty-two thousand, three hundred forty".