20388371 has 2 divisors, whose sum is σ = 20388372. Its totient is φ = 20388370.

The previous prime is 20388367. The next prime is 20388391. The reversal of 20388371 is 17388302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20388371 - 2² = 20388367 is a prime.

It is equal to p_1293683 and since 20388371 and 1293683 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20388391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10194185 + 10194186.

It is an arithmetic number, because the mean of its divisors is an integer number (10194186).

Almost surely, 2^20388371 is an apocalyptic number.

20388371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20388371 is an equidigital number, since it uses as much as digits as its factorization.

20388371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20388371 is about 4515.3483808008. The cubic root of 20388371 is about 273.1875117821.

The spelling of 20388371 in words is "twenty million, three hundred eighty-eight thousand, three hundred seventy-one".