20873803 has 2 divisors, whose sum is σ = 20873804. Its totient is φ = 20873802.

The previous prime is 20873789. The next prime is 20873813. The reversal of 20873803 is 30837802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20873803 - 2²¹ = 18776651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20873813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10436901 + 10436902.

It is an arithmetic number, because the mean of its divisors is an integer number (10436902).

Almost surely, 2^20873803 is an apocalyptic number.

20873803 is a deficient number, since it is larger than the sum of its proper divisors (1).

20873803 is an equidigital number, since it uses as much as digits as its factorization.

20873803 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 31.

The square root of 20873803 is about 4568.7857248945. The cubic root of 20873803 is about 275.3386593577.

The spelling of 20873803 in words is "twenty million, eight hundred seventy-three thousand, eight hundred three".