21429342762668 has 12 divisors (see below), whose sum is σ = 37502061844632. Its totient is φ = 10714467949920.

The previous prime is 21429342762649. The next prime is 21429342762701. The reversal of 21429342762668 is 86626724392412.

21429342762668 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21429342762668² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21429342762668.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50620718 + ... + 51042293.

It is an arithmetic number, because the mean of its divisors is an integer number (3125171820386).

Almost surely, 2^{21429342762668} is an apocalyptic number.

It is an amenable number.

21429342762668 is a deficient number, since it is larger than the sum of its proper divisors (16072719081964).

21429342762668 is a wasteful number, since it uses less digits than its factorization.

21429342762668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101715712 (or 101715710 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 62.

The spelling of 21429342762668 in words is "twenty-one trillion, four hundred twenty-nine billion, three hundred forty-two million, seven hundred sixty-two thousand, six hundred sixty-eight".