20111202340 has 24 divisors (see below), whose sum is σ = 43215701760. Its totient is φ = 7857399648.

The previous prime is 20111202337. The next prime is 20111202347. The reversal of 20111202340 is 4320211102.

It is not an unprimeable number, because it can be changed into a prime (20111202347) 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, 11691700 + ... + 11693419.

It is an arithmetic number, because the mean of its divisors is an integer number (1800654240).

Almost surely, 2^20111202340 is an apocalyptic number.

20111202340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111202340 is an abundant number, since it is smaller than the sum of its proper divisors (23104499420).

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

20111202340 is a wasteful number, since it uses less digits than its factorization.

20111202340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23385171 (or 23385169 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20111202340 its reverse (4320211102), we get a palindrome (24431413442).

The spelling of 20111202340 in words is "twenty billion, one hundred eleven million, two hundred two thousand, three hundred forty".