213371083638 has 96 divisors (see below), whose sum is σ = 494269776000. Its totient is φ = 66289616640.

The previous prime is 213371083543. The next prime is 213371083649. The reversal of 213371083638 is 836380173312.

213371083638 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 7 + 1 + 0 + 8 + 3 + 638 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213371083593 and 213371083602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19997581 + ... + 20008247.

It is an arithmetic number, because the mean of its divisors is an integer number (5148643500).

Almost surely, 2^213371083638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213371083638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247134888000).

213371083638 is an abundant number, since it is smaller than the sum of its proper divisors (280898692362).

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

213371083638 is a wasteful number, since it uses less digits than its factorization.

213371083638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11322 (or 11319 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 213371083638 in words is "two hundred thirteen billion, three hundred seventy-one million, eighty-three thousand, six hundred thirty-eight".