20400323371 has 2 divisors, whose sum is σ = 20400323372. Its totient is φ = 20400323370.

The previous prime is 20400323369. The next prime is 20400323381. The reversal of 20400323371 is 17332300402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20400323371 - 2¹ = 20400323369 is a prime.

Together with 20400323369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20400323311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200161685 + 10200161686.

It is an arithmetic number, because the mean of its divisors is an integer number (10200161686).

Almost surely, 2^20400323371 is an apocalyptic number.

20400323371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400323371 is an equidigital number, since it uses as much as digits as its factorization.

20400323371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 25.

Adding to 20400323371 its reverse (17332300402), we get a palindrome (37732623773).

The spelling of 20400323371 in words is "twenty billion, four hundred million, three hundred twenty-three thousand, three hundred seventy-one".