20340142240 has 96 divisors (see below), whose sum is σ = 52591000896. Its totient is φ = 7372584960.

The previous prime is 20340142237. The next prime is 20340142261. The reversal of 20340142240 is 4224104302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532419 + ... + 569341.

It is an arithmetic number, because the mean of its divisors is an integer number (547822926).

Almost surely, 2^20340142240 is an apocalyptic number.

20340142240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20340142240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26295500448).

20340142240 is an abundant number, since it is smaller than the sum of its proper divisors (32250858656).

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

20340142240 is a wasteful number, since it uses less digits than its factorization.

20340142240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37262 (or 37254 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20340142240 its reverse (4224104302), we get a palindrome (24564246542).

The spelling of 20340142240 in words is "twenty billion, three hundred forty million, one hundred forty-two thousand, two hundred forty".