213446020342664 has 16 divisors (see below), whose sum is σ = 400211446506000. Its totient is φ = 106722967941072.

The previous prime is 213446020342663. The next prime is 213446020342693. The reversal of 213446020342664 is 466243020644312.

It is a happy number.

It is a super-2 number, since 2×213446020342664² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213446020342661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30338759 + ... + 36706025.

It is an arithmetic number, because the mean of its divisors is an integer number (25013215406625).

Almost surely, 2^{213446020342664} is an apocalyptic number.

It is an amenable number.

213446020342664 is a deficient number, since it is larger than the sum of its proper divisors (186765426163336).

213446020342664 is a wasteful number, since it uses less digits than its factorization.

213446020342664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10557572 (or 10557568 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 47.

Adding to 213446020342664 its reverse (466243020644312), we get a palindrome (679689040986976).

The spelling of 213446020342664 in words is "two hundred thirteen trillion, four hundred forty-six billion, twenty million, three hundred forty-two thousand, six hundred sixty-four".