21202430 has 8 divisors (see below), whose sum is σ = 38164392. Its totient is φ = 8480968.

The previous prime is 21202429. The next prime is 21202459. The reversal of 21202430 is 3420212.

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

It is a congruent 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, 1060112 + ... + 1060131.

It is an arithmetic number, because the mean of its divisors is an integer number (4770549).

Almost surely, 2^21202430 is an apocalyptic number.

21202430 is a deficient number, since it is larger than the sum of its proper divisors (16961962).

21202430 is a wasteful number, since it uses less digits than its factorization.

21202430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120250.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21202430 is about 4604.6096468648. The cubic root of 21202430 is about 276.7760748558.

Adding to 21202430 its reverse (3420212), we get a palindrome (24622642).

The spelling of 21202430 in words is "twenty-one million, two hundred two thousand, four hundred thirty".