20303431420 has 24 divisors (see below), whose sum is σ = 42703749648. Its totient is φ = 8108697600.

The previous prime is 20303431399. The next prime is 20303431429. The reversal of 20303431420 is 2413430302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20303431391 and 20303431400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303431429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779046 + ... + 804685.

It is an arithmetic number, because the mean of its divisors is an integer number (1779322902).

Almost surely, 2^20303431420 is an apocalyptic number.

20303431420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20303431420 is an abundant number, since it is smaller than the sum of its proper divisors (22400318228).

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

20303431420 is a wasteful number, since it uses less digits than its factorization.

20303431420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584381 (or 1584379 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20303431420 its reverse (2413430302), we get a palindrome (22716861722).

The spelling of 20303431420 in words is "twenty billion, three hundred three million, four hundred thirty-one thousand, four hundred twenty".