21301402 has 16 divisors (see below), whose sum is σ = 33408000. Its totient is φ = 10174320.

The previous prime is 21301363. The next prime is 21301403. The reversal of 21301402 is 20410312.

It is not an unprimeable number, because it can be changed into a prime (21301403) 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, 2724 + ... + 7072.

It is an arithmetic number, because the mean of its divisors is an integer number (2088000).

Almost surely, 2^21301402 is an apocalyptic number.

21301402 is a deficient number, since it is larger than the sum of its proper divisors (12106598).

21301402 is a wasteful number, since it uses less digits than its factorization.

21301402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21301402 is about 4615.3441908486. The cubic root of 21301402 is about 277.2060659566.

Adding to 21301402 its reverse (20410312), we get a palindrome (41711714).

The spelling of 21301402 in words is "twenty-one million, three hundred one thousand, four hundred two".