21373202 has 4 divisors (see below), whose sum is σ = 32059806. Its totient is φ = 10686600.

The previous prime is 21373171. The next prime is 21373207. The reversal of 21373202 is 20237312.

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

It can be written as a sum of positive squares in only one way, i.e., 21242881 + 130321 = 4609^2 + 361^2 .

It is not an unprimeable number, because it can be changed into a prime (21373207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343299 + ... + 5343302.

Almost surely, 2^21373202 is an apocalyptic number.

21373202 is a deficient number, since it is larger than the sum of its proper divisors (10686604).

21373202 is a wasteful number, since it uses less digits than its factorization.

21373202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686603.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 21373202 is about 4623.1160487273. The cubic root of 21373202 is about 277.5171734090.

The spelling of 21373202 in words is "twenty-one million, three hundred seventy-three thousand, two hundred two".