21878382202 has 16 divisors (see below), whose sum is σ = 33086748672. Its totient is φ = 10849522320.

The previous prime is 21878382167. The next prime is 21878382209. The reversal of 21878382202 is 20228387812.

It is not an unprimeable number, because it can be changed into a prime (21878382209) 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 in 7 ways as a sum of consecutive naturals, for example, 879528 + ... + 904060.

It is an arithmetic number, because the mean of its divisors is an integer number (2067921792).

Almost surely, 2^21878382202 is an apocalyptic number.

21878382202 is a deficient number, since it is larger than the sum of its proper divisors (11208366470).

21878382202 is a wasteful number, since it uses less digits than its factorization.

21878382202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28173.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 21878382202 in words is "twenty-one billion, eight hundred seventy-eight million, three hundred eighty-two thousand, two hundred two".