21885218202 has 16 divisors (see below), whose sum is σ = 43775135712. Its totient is φ = 7294289520.

The previous prime is 21885218197. The next prime is 21885218233. The reversal of 21885218202 is 20281258812.

It is a super-2 number, since 2×21885218202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133749 + ... + 248312.

It is an arithmetic number, because the mean of its divisors is an integer number (2735945982).

Almost surely, 2^21885218202 is an apocalyptic number.

21885218202 is an abundant number, since it is smaller than the sum of its proper divisors (21889917510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21885218202 is a wasteful number, since it uses less digits than its factorization.

21885218202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391613.

The product of its (nonzero) digits is 40960, while the sum is 39.

The spelling of 21885218202 in words is "twenty-one billion, eight hundred eighty-five million, two hundred eighteen thousand, two hundred two".