21293773182 has 64 divisors (see below), whose sum is σ = 52103865600. Its totient is φ = 6392334240.

The previous prime is 21293773169. The next prime is 21293773187. The reversal of 21293773182 is 28137739212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21293773187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103957 + ... + 231072.

It is an arithmetic number, because the mean of its divisors is an integer number (814122900).

Almost surely, 2^21293773182 is an apocalyptic number.

21293773182 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21293773182 is an abundant number, since it is smaller than the sum of its proper divisors (30810092418).

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

21293773182 is a wasteful number, since it uses less digits than its factorization.

21293773182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335158 (or 335152 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The spelling of 21293773182 in words is "twenty-one billion, two hundred ninety-three million, seven hundred seventy-three thousand, one hundred eighty-two".