213394337538 has 64 divisors (see below), whose sum is σ = 439794316800. Its totient is φ = 68993252352.

The previous prime is 213394337509. The next prime is 213394337539. The reversal of 213394337538 is 835733493312.

213394337538 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (213394337539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19196670 + ... + 19207782.

It is an arithmetic number, because the mean of its divisors is an integer number (6871786200).

Almost surely, 2^213394337538 is an apocalyptic number.

213394337538 is an abundant number, since it is smaller than the sum of its proper divisors (226399979262).

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

213394337538 is a wasteful number, since it uses less digits than its factorization.

213394337538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11771.

The product of its digits is 4898880, while the sum is 51.

The spelling of 213394337538 in words is "two hundred thirteen billion, three hundred ninety-four million, three hundred thirty-seven thousand, five hundred thirty-eight".