21864875050 has 24 divisors (see below), whose sum is σ = 41980563072. Its totient is φ = 8463822000.

The previous prime is 21864875027. The next prime is 21864875063. The reversal of 21864875050 is 5057846812.

It is a super-2 number, since 2×21864875050² (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 (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7051636 + ... + 7054735.

It is an arithmetic number, because the mean of its divisors is an integer number (1749190128).

Almost surely, 2^21864875050 is an apocalyptic number.

21864875050 is a deficient number, since it is larger than the sum of its proper divisors (20115688022).

21864875050 is a wasteful number, since it uses less digits than its factorization.

21864875050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14106414 (or 14106409 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 21864875050 in words is "twenty-one billion, eight hundred sixty-four million, eight hundred seventy-five thousand, fifty".