20424342140 has 24 divisors (see below), whose sum is σ = 44370123840. Its totient is φ = 7888021568.

The previous prime is 20424342121. The next prime is 20424342149. The reversal of 20424342140 is 4124342402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424342149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17606612 + ... + 17607771.

It is an arithmetic number, because the mean of its divisors is an integer number (1848755160).

Almost surely, 2^20424342140 is an apocalyptic number.

20424342140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424342140 is an abundant number, since it is smaller than the sum of its proper divisors (23945781700).

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

20424342140 is a wasteful number, since it uses less digits than its factorization.

20424342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35214421 (or 35214419 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20424342140 its reverse (4124342402), we get a palindrome (24548684542).

The spelling of 20424342140 in words is "twenty billion, four hundred twenty-four million, three hundred forty-two thousand, one hundred forty".