213803666672 has 20 divisors (see below), whose sum is σ = 414443156976. Its totient is φ = 106850593920.

The previous prime is 213803666647. The next prime is 213803666677. The reversal of 213803666672 is 276666308312.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 213803666672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213803666677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3168029 + ... + 3234812.

Almost surely, 2^213803666672 is an apocalyptic number.

It is an amenable number.

213803666672 is a deficient number, since it is larger than the sum of its proper divisors (200639490304).

213803666672 is a wasteful number, since it uses less digits than its factorization.

213803666672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404936 (or 6404930 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 50.

The spelling of 213803666672 in words is "two hundred thirteen billion, eight hundred three million, six hundred sixty-six thousand, six hundred seventy-two".