20131020103420 has 24 divisors (see below), whose sum is σ = 42275357659584. Its totient is φ = 8052367004736.

The previous prime is 20131020103409. The next prime is 20131020103451. The reversal of 20131020103420 is 2430102013102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1624734 + ... + 6549946.

It is an arithmetic number, because the mean of its divisors is an integer number (1761473235816).

Almost surely, 2^{20131020103420} is an apocalyptic number.

20131020103420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20131020103420 is an abundant number, since it is smaller than the sum of its proper divisors (22144337556164).

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

20131020103420 is a wasteful number, since it uses less digits than its factorization.

20131020103420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129589 (or 5129587 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20131020103420 its reverse (2430102013102), we get a palindrome (22561122116522).

The spelling of 20131020103420 in words is "twenty trillion, one hundred thirty-one billion, twenty million, one hundred three thousand, four hundred twenty".