213801863886 has 48 divisors (see below), whose sum is σ = 499473243360. Its totient is φ = 65705774400.

The previous prime is 213801863881. The next prime is 213801863921. The reversal of 213801863886 is 688368108312.

213801863886 is a `hidden beast` number, since 2 + 1 + 3 + 80 + 186 + 388 + 6 = 666.

It is a super-2 number, since 2×213801863886² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213801863881) 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, 357090 + ... + 745061.

It is an arithmetic number, because the mean of its divisors is an integer number (10405692570).

Almost surely, 2^213801863886 is an apocalyptic number.

213801863886 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213801863886 is an abundant number, since it is smaller than the sum of its proper divisors (285671379474).

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

213801863886 is a wasteful number, since it uses less digits than its factorization.

213801863886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103001 (or 1102998 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 213801863886 in words is "two hundred thirteen billion, eight hundred one million, eight hundred sixty-three thousand, eight hundred eighty-six".