20424002420231 has 2 divisors, whose sum is σ = 20424002420232. Its totient is φ = 20424002420230.

The previous prime is 20424002420191. The next prime is 20424002420287. The reversal of 20424002420231 is 13202420042402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20424002420231 is a prime.

It is a super-2 number, since 2×20424002420231² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20424002420231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424002420291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212001210115 + 10212001210116.

It is an arithmetic number, because the mean of its divisors is an integer number (10212001210116).

Almost surely, 2^{20424002420231} is an apocalyptic number.

20424002420231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424002420231 is an equidigital number, since it uses as much as digits as its factorization.

20424002420231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20424002420231 its reverse (13202420042402), we get a palindrome (33626422462633).

The spelling of 20424002420231 in words is "twenty trillion, four hundred twenty-four billion, two million, four hundred twenty thousand, two hundred thirty-one".