20420143213420 has 12 divisors (see below), whose sum is σ = 42882300748224. Its totient is φ = 8168057285360.

The previous prime is 20420143213373. The next prime is 20420143213451. The reversal of 20420143213420 is 2431234102402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510503580316 + ... + 510503580355.

It is an arithmetic number, because the mean of its divisors is an integer number (3573525062352).

Almost surely, 2^{20420143213420} is an apocalyptic number.

20420143213420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420143213420 is an abundant number, since it is smaller than the sum of its proper divisors (22462157534804).

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

20420143213420 is a wasteful number, since it uses less digits than its factorization.

20420143213420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021007160680 (or 1021007160678 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20420143213420 its reverse (2431234102402), we get a palindrome (22851377315822).

The spelling of 20420143213420 in words is "twenty trillion, four hundred twenty billion, one hundred forty-three million, two hundred thirteen thousand, four hundred twenty".