21200402 has 8 divisors (see below), whose sum is σ = 31978800. Its totient is φ = 10540804.

The previous prime is 21200401. The next prime is 21200461. The reversal of 21200402 is 20400212.

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

It is not an unprimeable number, because it can be changed into a prime (21200401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29252 + ... + 29967.

It is an arithmetic number, because the mean of its divisors is an integer number (3997350).

Almost surely, 2^21200402 is an apocalyptic number.

21200402 is a deficient number, since it is larger than the sum of its proper divisors (10778398).

21200402 is a wasteful number, since it uses less digits than its factorization.

21200402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59400.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 21200402 is about 4604.3894274920. The cubic root of 21200402 is about 276.7672500847.

Adding to 21200402 its reverse (20400212), we get a palindrome (41600614).

The spelling of 21200402 in words is "twenty-one million, two hundred thousand, four hundred two".