21302402 has 8 divisors (see below), whose sum is σ = 34858512. Its totient is φ = 9682900.

The previous prime is 21302399. The next prime is 21302419. The reversal of 21302402 is 20420312.

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

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, 484124 + ... + 484167.

It is an arithmetic number, because the mean of its divisors is an integer number (4357314).

Almost surely, 2^21302402 is an apocalyptic number.

21302402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21302402 is a deficient number, since it is larger than the sum of its proper divisors (13556110).

21302402 is a wasteful number, since it uses less digits than its factorization.

21302402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968304.

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

The square root of 21302402 is about 4615.4525238594. The cubic root of 21302402 is about 277.2104037263.

Adding to 21302402 its reverse (20420312), we get a palindrome (41722714).

The spelling of 21302402 in words is "twenty-one million, three hundred two thousand, four hundred two".