20430400122020 has 24 divisors (see below), whose sum is σ = 49032960293184. Its totient is φ = 7004708613216.

The previous prime is 20430400122017. The next prime is 20430400122113. The reversal of 20430400122020 is 2022100403402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20430400121983 and 20430400122001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72965714582 + ... + 72965714861.

It is an arithmetic number, because the mean of its divisors is an integer number (2043040012216).

Almost surely, 2^{20430400122020} is an apocalyptic number.

20430400122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430400122020 is an abundant number, since it is smaller than the sum of its proper divisors (28602560171164).

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

20430400122020 is a wasteful number, since it uses less digits than its factorization.

20430400122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145931429459 (or 145931429457 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20430400122020 its reverse (2022100403402), we get a palindrome (22452500525422).

The spelling of 20430400122020 in words is "twenty trillion, four hundred thirty billion, four hundred million, one hundred twenty-two thousand, twenty".