20378552231 has 2 divisors, whose sum is σ = 20378552232. Its totient is φ = 20378552230.

The previous prime is 20378552153. The next prime is 20378552237. The reversal of 20378552231 is 13225587302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20378552231 - 2¹⁴ = 20378535847 is a prime.

It is a super-2 number, since 2×20378552231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20378552237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10189276115 + 10189276116.

It is an arithmetic number, because the mean of its divisors is an integer number (10189276116).

Almost surely, 2^20378552231 is an apocalyptic number.

20378552231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20378552231 is an equidigital number, since it uses as much as digits as its factorization.

20378552231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 20378552231 in words is "twenty billion, three hundred seventy-eight million, five hundred fifty-two thousand, two hundred thirty-one".