218396441810 has 32 divisors (see below), whose sum is σ = 423437939712. Its totient is φ = 80864879040.

The previous prime is 218396441749. The next prime is 218396441831. The reversal of 218396441810 is 18144693812.

It is a happy number.

It is a super-2 number, since 2×218396441810² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15308189 + ... + 15322448.

It is an arithmetic number, because the mean of its divisors is an integer number (13232435616).

Almost surely, 2^218396441810 is an apocalyptic number.

218396441810 is a deficient number, since it is larger than the sum of its proper divisors (205041497902).

218396441810 is a wasteful number, since it uses less digits than its factorization.

218396441810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30630698.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 218396441810 in words is "two hundred eighteen billion, three hundred ninety-six million, four hundred forty-one thousand, eight hundred ten".