23771421893 has 2 divisors, whose sum is σ = 23771421894. Its totient is φ = 23771421892.

The previous prime is 23771421871. The next prime is 23771421923. The reversal of 23771421893 is 39812417732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17556780004 + 6214641889 = 132502^2 + 78833^2 .

It is a cyclic number.

It is not a de Polignac number, because 23771421893 - 2¹⁴ = 23771405509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23771421823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11885710946 + 11885710947.

It is an arithmetic number, because the mean of its divisors is an integer number (11885710947).

Almost surely, 2^23771421893 is an apocalyptic number.

It is an amenable number.

23771421893 is a deficient number, since it is larger than the sum of its proper divisors (1).

23771421893 is an equidigital number, since it uses as much as digits as its factorization.

23771421893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The spelling of 23771421893 in words is "twenty-three billion, seven hundred seventy-one million, four hundred twenty-one thousand, eight hundred ninety-three".