21310273194 has 64 divisors (see below), whose sum is σ = 54288921600. Its totient is φ = 5428885248.

The previous prime is 21310273183. The next prime is 21310273199. The reversal of 21310273194 is 49137201312.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21310273199) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 771864 + ... + 798995.

It is an arithmetic number, because the mean of its divisors is an integer number (848264400).

Almost surely, 2^21310273194 is an apocalyptic number.

21310273194 is an abundant number, since it is smaller than the sum of its proper divisors (32978648406).

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

21310273194 is a wasteful number, since it uses less digits than its factorization.

21310273194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570907.

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 21310273194 in words is "twenty-one billion, three hundred ten million, two hundred seventy-three thousand, one hundred ninety-four".