103431220020 has 36 divisors (see below), whose sum is σ = 313741367940. Its totient is φ = 27581658624.

The previous prime is 103431220019. The next prime is 103431220049. The reversal of 103431220020 is 20022134301.

103431220020 is a `hidden beast` number, since 10 + 3 + 431 + 2 + 200 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25714046736 + 77717173284 = 160356^2 + 278778^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 103431219975 and 103431220002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287308765 + ... + 287309124.

Almost surely, 2^103431220020 is an apocalyptic number.

103431220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103431220020 is an abundant number, since it is smaller than the sum of its proper divisors (210310147920).

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

103431220020 is a wasteful number, since it uses less digits than its factorization.

103431220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574617904 (or 574617899 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 103431220020 its reverse (20022134301), we get a palindrome (123453354321).

The spelling of 103431220020 in words is "one hundred three billion, four hundred thirty-one million, two hundred twenty thousand, twenty".