21374003 has 8 divisors (see below), whose sum is σ = 24737280. Its totient is φ = 18088200.

The previous prime is 21373991. The next prime is 21374011. The reversal of 21374003 is 30047312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21374003 - 2⁴ = 21373987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21374203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18773 + ... + 19878.

It is an arithmetic number, because the mean of its divisors is an integer number (3092160).

Almost surely, 2^21374003 is an apocalyptic number.

21374003 is a deficient number, since it is larger than the sum of its proper divisors (3363277).

21374003 is an equidigital number, since it uses as much as digits as its factorization.

21374003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38737.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 21374003 is about 4623.2026777982. The cubic root of 21374003 is about 277.5206401876.

The spelling of 21374003 in words is "twenty-one million, three hundred seventy-four thousand, three".