21434603 has 8 divisors (see below), whose sum is σ = 23890320. Its totient is φ = 19111680.

The previous prime is 21434591. The next prime is 21434639. The reversal of 21434603 is 30643412.

It is a happy number.

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 21434603 - 2⁴ = 21434587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21464603) 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, 32858 + ... + 33503.

It is an arithmetic number, because the mean of its divisors is an integer number (2986290).

Almost surely, 2^21434603 is an apocalyptic number.

21434603 is a deficient number, since it is larger than the sum of its proper divisors (2455717).

21434603 is a wasteful number, since it uses less digits than its factorization.

21434603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66397.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 21434603 is about 4629.7519371992. The cubic root of 21434603 is about 277.7826700590.

The spelling of 21434603 in words is "twenty-one million, four hundred thirty-four thousand, six hundred three".