18212605086 has 48 divisors (see below), whose sum is σ = 39468971520. Its totient is φ = 5600144160.

The previous prime is 18212605079. The next prime is 18212605111. The reversal of 18212605086 is 68050621281.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1778521 + ... + 1788731.

It is an arithmetic number, because the mean of its divisors is an integer number (822270240).

Almost surely, 2^18212605086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18212605086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19734485760).

18212605086 is an abundant number, since it is smaller than the sum of its proper divisors (21256366434).

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

18212605086 is a wasteful number, since it uses less digits than its factorization.

18212605086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12001 (or 11988 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 18212605086 in words is "eighteen billion, two hundred twelve million, six hundred five thousand, eighty-six".