20231020040687 has 2 divisors, whose sum is σ = 20231020040688. Its totient is φ = 20231020040686.

The previous prime is 20231020040603. The next prime is 20231020040761. The reversal of 20231020040687 is 78604002013202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20231020040687 - 2²⁶ = 20230952931823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20231020040087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115510020343 + 10115510020344.

It is an arithmetic number, because the mean of its divisors is an integer number (10115510020344).

Almost surely, 2^{20231020040687} is an apocalyptic number.

20231020040687 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231020040687 is an equidigital number, since it uses as much as digits as its factorization.

20231020040687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

Adding to 20231020040687 its reverse (78604002013202), we get a palindrome (98835022053889).

The spelling of 20231020040687 in words is "twenty trillion, two hundred thirty-one billion, twenty million, forty thousand, six hundred eighty-seven".