21340557182 has 8 divisors (see below), whose sum is σ = 36583812336. Its totient is φ = 9145953072.

The previous prime is 21340557179. The next prime is 21340557187. The reversal of 21340557182 is 28175504312.

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

It is a super-2 number, since 2×21340557182² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340557187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762162743 + ... + 762162770.

It is an arithmetic number, because the mean of its divisors is an integer number (4572976542).

Almost surely, 2^21340557182 is an apocalyptic number.

21340557182 is a deficient number, since it is larger than the sum of its proper divisors (15243255154).

21340557182 is a wasteful number, since it uses less digits than its factorization.

21340557182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524325522.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 21340557182 in words is "twenty-one billion, three hundred forty million, five hundred fifty-seven thousand, one hundred eighty-two".