213586474638 has 16 divisors (see below), whose sum is σ = 449655736320. Its totient is φ = 67448360376.

The previous prime is 213586474627. The next prime is 213586474721. The reversal of 213586474638 is 836474685312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936782670 + ... + 936782897.

It is an arithmetic number, because the mean of its divisors is an integer number (28103483520).

Almost surely, 2^213586474638 is an apocalyptic number.

213586474638 is an abundant number, since it is smaller than the sum of its proper divisors (236069261682).

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

213586474638 is a wasteful number, since it uses less digits than its factorization.

213586474638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873565591.

The product of its digits is 23224320, while the sum is 57.

The spelling of 213586474638 in words is "two hundred thirteen billion, five hundred eighty-six million, four hundred seventy-four thousand, six hundred thirty-eight".