20373391 has 2 divisors, whose sum is σ = 20373392. Its totient is φ = 20373390.

The previous prime is 20373371. The next prime is 20373401. The reversal of 20373391 is 19337302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20373391 - 2⁹ = 20372879 is a prime.

It is a Chen prime.

It is equal to p_1292770 and since 20373391 and 1292770 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20373371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186695 + 10186696.

It is an arithmetic number, because the mean of its divisors is an integer number (10186696).

Almost surely, 2^20373391 is an apocalyptic number.

20373391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20373391 is an equidigital number, since it uses as much as digits as its factorization.

20373391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 20373391 is about 4513.6892892622. The cubic root of 20373391 is about 273.1205888027.

The spelling of 20373391 in words is "twenty million, three hundred seventy-three thousand, three hundred ninety-one".