20345413431 has 24 divisors (see below), whose sum is σ = 31579647984. Its totient is φ = 11617294080.

The previous prime is 20345413423. The next prime is 20345413447. The reversal of 20345413431 is 13431454302.

It is not a de Polignac number, because 20345413431 - 2³ = 20345413423 is a prime.

It is a super-2 number, since 2×20345413431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345413471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149221 + ... + 250913.

It is an arithmetic number, because the mean of its divisors is an integer number (1315818666).

Almost surely, 2^20345413431 is an apocalyptic number.

20345413431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20345413431 is a deficient number, since it is larger than the sum of its proper divisors (11234234553).

20345413431 is a wasteful number, since it uses less digits than its factorization.

20345413431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103071 (or 103064 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 20345413431 its reverse (13431454302), we get a palindrome (33776867733).

The spelling of 20345413431 in words is "twenty billion, three hundred forty-five million, four hundred thirteen thousand, four hundred thirty-one".