20378003 has 2 divisors, whose sum is σ = 20378004. Its totient is φ = 20378002.

The previous prime is 20377993. The next prime is 20378027. The reversal of 20378003 is 30087302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20378003 - 2⁶ = 20377939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20378003.

It is not a weakly prime, because it can be changed into another prime (20378093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10189001 + 10189002.

It is an arithmetic number, because the mean of its divisors is an integer number (10189002).

Almost surely, 2^20378003 is an apocalyptic number.

20378003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20378003 is an equidigital number, since it uses as much as digits as its factorization.

20378003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20378003 is about 4514.2001506358. The cubic root of 20378003 is about 273.1411963543.

The spelling of 20378003 in words is "twenty million, three hundred seventy-eight thousand, three".