21283891185 has 32 divisors (see below), whose sum is σ = 35278064640. Its totient is φ = 10946073600.

The previous prime is 21283891171. The next prime is 21283891199. The reversal of 21283891185 is 58119838212.

It is an interprime number because it is at equal distance from previous prime (21283891171) and next prime (21283891199).

It is not a de Polignac number, because 21283891185 - 2¹⁶ = 21283825649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49221 + ... + 212109.

It is an arithmetic number, because the mean of its divisors is an integer number (1102439520).

Almost surely, 2^21283891185 is an apocalyptic number.

It is an amenable number.

21283891185 is a deficient number, since it is larger than the sum of its proper divisors (13994173455).

21283891185 is a wasteful number, since it uses less digits than its factorization.

21283891185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163209.

The product of its digits is 276480, while the sum is 48.

The spelling of 21283891185 in words is "twenty-one billion, two hundred eighty-three million, eight hundred ninety-one thousand, one hundred eighty-five".