20388803 has 2 divisors, whose sum is σ = 20388804. Its totient is φ = 20388802.

The previous prime is 20388779. The next prime is 20388811. The reversal of 20388803 is 30888302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20388803 - 2⁸ = 20388547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20388803.

It is not a weakly prime, because it can be changed into another prime (20388853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10194401 + 10194402.

It is an arithmetic number, because the mean of its divisors is an integer number (10194402).

Almost surely, 2^20388803 is an apocalyptic number.

20388803 is a deficient number, since it is larger than the sum of its proper divisors (1).

20388803 is an equidigital number, since it uses as much as digits as its factorization.

20388803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 20388803 is about 4515.3962173878. The cubic root of 20388803 is about 273.1894412508.

The spelling of 20388803 in words is "twenty million, three hundred eighty-eight thousand, eight hundred three".