20201242431 has 4 divisors (see below), whose sum is σ = 26934989912. Its totient is φ = 13467494952.

The previous prime is 20201242423. The next prime is 20201242459. The reversal of 20201242431 is 13424210202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20201242431 - 2³ = 20201242423 is a prime.

It is a super-2 number, since 2×20201242431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201242398 and 20201242407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201242031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366873736 + ... + 3366873741.

It is an arithmetic number, because the mean of its divisors is an integer number (6733747478).

Almost surely, 2^20201242431 is an apocalyptic number.

20201242431 is a deficient number, since it is larger than the sum of its proper divisors (6733747481).

20201242431 is an equidigital number, since it uses as much as digits as its factorization.

20201242431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733747480.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20201242431 its reverse (13424210202), we get a palindrome (33625452633).

The spelling of 20201242431 in words is "twenty billion, two hundred one million, two hundred forty-two thousand, four hundred thirty-one".