21902851273 has 8 divisors (see below), whose sum is σ = 22242720960. Its totient is φ = 21563853360.

The previous prime is 21902851241. The next prime is 21902851277. The reversal of 21902851273 is 37215820912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21902851273 - 2⁵ = 21902851241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21902851277) 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, 167215 + ... + 267892.

It is an arithmetic number, because the mean of its divisors is an integer number (2780340120).

Almost surely, 2^21902851273 is an apocalyptic number.

It is an amenable number.

21902851273 is a deficient number, since it is larger than the sum of its proper divisors (339869687).

21902851273 is an equidigital number, since it uses as much as digits as its factorization.

21902851273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435887.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 21902851273 in words is "twenty-one billion, nine hundred two million, eight hundred fifty-one thousand, two hundred seventy-three".