212620403894 has 16 divisors (see below), whose sum is σ = 337906816128. Its totient is φ = 99992783232.

The previous prime is 212620403893. The next prime is 212620403899. The reversal of 212620403894 is 498304026212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212620403893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1942109 + ... + 2048664.

It is an arithmetic number, because the mean of its divisors is an integer number (21119176008).

Almost surely, 2^212620403894 is an apocalyptic number.

212620403894 is a deficient number, since it is larger than the sum of its proper divisors (125286412234).

212620403894 is a wasteful number, since it uses less digits than its factorization.

212620403894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992359.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 212620403894 in words is "two hundred twelve billion, six hundred twenty million, four hundred three thousand, eight hundred ninety-four".