21702975202 has 4 divisors (see below), whose sum is σ = 32554462806. Its totient is φ = 10851487600.

The previous prime is 21702975193. The next prime is 21702975209. The reversal of 21702975202 is 20257920712.

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., 21304613521 + 398361681 = 145961^2 + 19959^2 .

It is not an unprimeable number, because it can be changed into a prime (21702975209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5425743799 + ... + 5425743802.

Almost surely, 2^21702975202 is an apocalyptic number.

21702975202 is a deficient number, since it is larger than the sum of its proper divisors (10851487604).

21702975202 is a wasteful number, since it uses less digits than its factorization.

21702975202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10851487603.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 21702975202 in words is "twenty-one billion, seven hundred two million, nine hundred seventy-five thousand, two hundred two".