21425302 has 4 divisors (see below), whose sum is σ = 32137956. Its totient is φ = 10712650.

The previous prime is 21425297. The next prime is 21425311. The reversal of 21425302 is 20352412.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21425302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5356324 + ... + 5356327.

It is an arithmetic number, because the mean of its divisors is an integer number (8034489).

Almost surely, 2^21425302 is an apocalyptic number.

21425302 is a deficient number, since it is larger than the sum of its proper divisors (10712654).

21425302 is a wasteful number, since it uses less digits than its factorization.

21425302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712653.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21425302 is about 4628.7473467451. The cubic root of 21425302 is about 277.7424853414.

Adding to 21425302 its reverse (20352412), we get a palindrome (41777714).

The spelling of 21425302 in words is "twenty-one million, four hundred twenty-five thousand, three hundred two".