20748153202391 has 2 divisors, whose sum is σ = 20748153202392. Its totient is φ = 20748153202390.

The previous prime is 20748153202369. The next prime is 20748153202393. The reversal of 20748153202391 is 19320235184702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20748153202391 - 2¹⁰ = 20748153201367 is a prime.

It is a super-2 number, since 2×20748153202391² (a number of 27 digits) contains 22 as substring.

Together with 20748153202393, 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 (20748153202393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374076601195 + 10374076601196.

It is an arithmetic number, because the mean of its divisors is an integer number (10374076601196).

Almost surely, 2^{20748153202391} is an apocalyptic number.

20748153202391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20748153202391 is an equidigital number, since it uses as much as digits as its factorization.

20748153202391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20748153202391 in words is "twenty trillion, seven hundred forty-eight billion, one hundred fifty-three million, two hundred two thousand, three hundred ninety-one".