218487013890 has 64 divisors (see below), whose sum is σ = 552800747520. Its totient is φ = 55184080320.

The previous prime is 218487013841. The next prime is 218487013939. The reversal of 218487013890 is 98310784812.

It is an interprime number because it is at equal distance from previous prime (218487013841) and next prime (218487013939).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2455570 + ... + 2542989.

It is an arithmetic number, because the mean of its divisors is an integer number (8637511680).

Almost surely, 2^218487013890 is an apocalyptic number.

218487013890 is an abundant number, since it is smaller than the sum of its proper divisors (334313733630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218487013890 is a wasteful number, since it uses less digits than its factorization.

218487013890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998647.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 218487013890 in words is "two hundred eighteen billion, four hundred eighty-seven million, thirteen thousand, eight hundred ninety".