21343777734312 has 64 divisors (see below), whose sum is σ = 64678114353600. Its totient is φ = 6467811433920.

The previous prime is 21343777734311. The next prime is 21343777734319.

21343777734312 is a `hidden beast` number, since 2 + 134 + 3 + 7 + 7 + 7 + 73 + 431 + 2 = 666.

21343777734312 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21343777734312² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21343777734311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4491533343 + ... + 4491538094.

It is an arithmetic number, because the mean of its divisors is an integer number (1010595536775).

Almost surely, 2^{21343777734312} is an apocalyptic number.

21343777734312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21343777734312 is an abundant number, since it is smaller than the sum of its proper divisors (43334336619288).

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

21343777734312 is a wasteful number, since it uses less digits than its factorization.

21343777734312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8983071463 (or 8983071453 counting only the distinct ones).

The product of its digits is 12446784, while the sum is 54.

It can be divided in two parts, 2134377 and 7734312, that added together give a palindrome (9868689).

The spelling of 21343777734312 in words is "twenty-one trillion, three hundred forty-three billion, seven hundred seventy-seven million, seven hundred thirty-four thousand, three hundred twelve".