21454603 has 6 divisors (see below), whose sum is σ = 21992372. Its totient is φ = 20929680.

The previous prime is 21454547. The next prime is 21454613. The reversal of 21454603 is 30645412.

It is not a de Polignac number, because 21454603 - 2⁹ = 21454091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21454613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4701 + ... + 8062.

Almost surely, 2^21454603 is an apocalyptic number.

21454603 is a deficient number, since it is larger than the sum of its proper divisors (537769).

21454603 is an equidigital number, since it uses as much as digits as its factorization.

21454603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12845 (or 12804 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 21454603 is about 4631.9113765270. The cubic root of 21454603 is about 277.8690401581.

The spelling of 21454603 in words is "twenty-one million, four hundred fifty-four thousand, six hundred three".