20375296391 has 2 divisors, whose sum is σ = 20375296392. Its totient is φ = 20375296390.

The previous prime is 20375296379. The next prime is 20375296393. The reversal of 20375296391 is 19369257302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20375296391 is a prime.

It is a super-3 number, since 3×20375296391³ (a number of 32 digits) contains 333 as substring.

Together with 20375296393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20375296393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187648195 + 10187648196.

It is an arithmetic number, because the mean of its divisors is an integer number (10187648196).

Almost surely, 2^20375296391 is an apocalyptic number.

20375296391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375296391 is an equidigital number, since it uses as much as digits as its factorization.

20375296391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 47.

The spelling of 20375296391 in words is "twenty billion, three hundred seventy-five million, two hundred ninety-six thousand, three hundred ninety-one".