20023315452787 has 2 divisors, whose sum is σ = 20023315452788. Its totient is φ = 20023315452786.

The previous prime is 20023315452737. The next prime is 20023315452797. The reversal of 20023315452787 is 78725451332002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20023315452787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20023315452787.

It is not a weakly prime, because it can be changed into another prime (20023315452737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011657726393 + 10011657726394.

It is an arithmetic number, because the mean of its divisors is an integer number (10011657726394).

Almost surely, 2^{20023315452787} is an apocalyptic number.

20023315452787 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023315452787 is an equidigital number, since it uses as much as digits as its factorization.

20023315452787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2822400, while the sum is 49.

Adding to 20023315452787 its reverse (78725451332002), we get a palindrome (98748766784789).

The spelling of 20023315452787 in words is "twenty trillion, twenty-three billion, three hundred fifteen million, four hundred fifty-two thousand, seven hundred eighty-seven".