20368819 has 2 divisors, whose sum is σ = 20368820. Its totient is φ = 20368818.

The previous prime is 20368811. The next prime is 20368837. The reversal of 20368819 is 91886302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20368819 - 2³ = 20368811 is a prime.

It is a super-2 number, since 2×20368819² = 829777574909522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20368811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10184409 + 10184410.

It is an arithmetic number, because the mean of its divisors is an integer number (10184410).

Almost surely, 2^20368819 is an apocalyptic number.

20368819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20368819 is an equidigital number, since it uses as much as digits as its factorization.

20368819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 20368819 is about 4513.1828015271. The cubic root of 20368819 is about 273.1001569111.

The spelling of 20368819 in words is "twenty million, three hundred sixty-eight thousand, eight hundred nineteen".