21306258202 has 16 divisors (see below), whose sum is σ = 33843882240. Its totient is φ = 10025131968.

The previous prime is 21306258179. The next prime is 21306258203. The reversal of 21306258202 is 20285260312.

It is not an unprimeable number, because it can be changed into a prime (21306258203) 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, 243949 + ... + 319567.

It is an arithmetic number, because the mean of its divisors is an integer number (2115242640).

Almost surely, 2^21306258202 is an apocalyptic number.

21306258202 is a deficient number, since it is larger than the sum of its proper divisors (12537624038).

21306258202 is a wasteful number, since it uses less digits than its factorization.

21306258202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83925.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 21306258202 in words is "twenty-one billion, three hundred six million, two hundred fifty-eight thousand, two hundred two".