20331420243 has 4 divisors (see below), whose sum is σ = 27108560328. Its totient is φ = 13554280160.

The previous prime is 20331420203. The next prime is 20331420247. The reversal of 20331420243 is 34202413302.

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

It is a cyclic number.

It is not a de Polignac number, because 20331420243 - 2²⁸ = 20062984787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20331420247) 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, 3388570038 + ... + 3388570043.

It is an arithmetic number, because the mean of its divisors is an integer number (6777140082).

Almost surely, 2^20331420243 is an apocalyptic number.

20331420243 is a deficient number, since it is larger than the sum of its proper divisors (6777140085).

20331420243 is an equidigital number, since it uses as much as digits as its factorization.

20331420243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6777140084.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20331420243 its reverse (34202413302), we get a palindrome (54533833545).

The spelling of 20331420243 in words is "twenty billion, three hundred thirty-one million, four hundred twenty thousand, two hundred forty-three".