218381804372 has 12 divisors (see below), whose sum is σ = 387872160480. Its totient is φ = 107561187096.

The previous prime is 218381804317. The next prime is 218381804387. The reversal of 218381804372 is 273408183812.

It is a super-2 number, since 2×218381804372² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 407428472 + ... + 407429007.

It is an arithmetic number, because the mean of its divisors is an integer number (32322680040).

Almost surely, 2^218381804372 is an apocalyptic number.

It is an amenable number.

218381804372 is a deficient number, since it is larger than the sum of its proper divisors (169490356108).

218381804372 is a wasteful number, since it uses less digits than its factorization.

218381804372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814857550 (or 814857548 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 218381804372 in words is "two hundred eighteen billion, three hundred eighty-one million, eight hundred four thousand, three hundred seventy-two".