218917992093530 has 48 divisors (see below), whose sum is σ = 415910881160064. Its totient is φ = 82952943700320.

The previous prime is 218917992093461. The next prime is 218917992093539. The reversal of 218917992093530 is 35390299719812.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218917992093539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53142779 + ... + 57113841.

It is an arithmetic number, because the mean of its divisors is an integer number (8664810024168).

Almost surely, 2^{218917992093530} is an apocalyptic number.

218917992093530 is a deficient number, since it is larger than the sum of its proper divisors (196992889066534).

218917992093530 is a wasteful number, since it uses less digits than its factorization.

218917992093530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986379 (or 3986360 counting only the distinct ones).

The product of its (nonzero) digits is 66134880, while the sum is 68.

The spelling of 218917992093530 in words is "two hundred eighteen trillion, nine hundred seventeen billion, nine hundred ninety-two million, ninety-three thousand, five hundred thirty".