21203034 has 8 divisors (see below), whose sum is σ = 42406080. Its totient is φ = 7067676.

The previous prime is 21203023. The next prime is 21203041. The reversal of 21203034 is 43030212.

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

21203034 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1766914 + ... + 1766925.

It is an arithmetic number, because the mean of its divisors is an integer number (5300760).

Almost surely, 2^21203034 is an apocalyptic number.

21203034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203034 is a wasteful number, since it uses less digits than its factorization.

21203034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533844.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21203034 is about 4604.6752328476. The cubic root of 21203034 is about 276.7787030320.

Adding to 21203034 its reverse (43030212), we get a palindrome (64233246).

The spelling of 21203034 in words is "twenty-one million, two hundred three thousand, thirty-four".