20700903 has 4 divisors (see below), whose sum is σ = 27601208. Its totient is φ = 13800600.

The previous prime is 20700887. The next prime is 20700929. The reversal of 20700903 is 30900702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20700903 - 2⁴ = 20700887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20700903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3450148 + ... + 3450153.

It is an arithmetic number, because the mean of its divisors is an integer number (6900302).

Almost surely, 2^20700903 is an apocalyptic number.

20700903 is a deficient number, since it is larger than the sum of its proper divisors (6900305).

20700903 is an equidigital number, since it uses as much as digits as its factorization.

20700903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900304.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 20700903 is about 4549.8245021099. The cubic root of 20700903 is about 274.5763305433.

The spelling of 20700903 in words is "twenty million, seven hundred thousand, nine hundred three".