20340142020 has 144 divisors (see below), whose sum is σ = 67357967040. Its totient is φ = 4927238400.

The previous prime is 20340142019. The next prime is 20340142027. The reversal of 20340142020 is 2024104302.

20340142020 is a `hidden beast` number, since 203 + 40 + 1 + 420 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20340141984 and 20340142002.

It is not an unprimeable number, because it can be changed into a prime (20340142027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3380815 + ... + 3386825.

It is an arithmetic number, because the mean of its divisors is an integer number (467763660).

Almost surely, 2^20340142020 is an apocalyptic number.

20340142020 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 20340142020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33678983520).

20340142020 is an abundant number, since it is smaller than the sum of its proper divisors (47017825020).

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

20340142020 is a wasteful number, since it uses less digits than its factorization.

20340142020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7746 (or 7741 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20340142020 its reverse (2024104302), we get a palindrome (22364246322).

The spelling of 20340142020 in words is "twenty billion, three hundred forty million, one hundred forty-two thousand, twenty".