206237689893 has 16 divisors (see below), whose sum is σ = 306074313600. Its totient is φ = 137250145440.

The previous prime is 206237689877. The next prime is 206237689901. The reversal of 206237689893 is 398986732602.

It is not a de Polignac number, because 206237689893 - 2⁴ = 206237689877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206237689893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206237689843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6696793 + ... + 6727518.

It is an arithmetic number, because the mean of its divisors is an integer number (19129644600).

Almost surely, 2^206237689893 is an apocalyptic number.

It is an amenable number.

206237689893 is a deficient number, since it is larger than the sum of its proper divisors (99836623707).

206237689893 is a wasteful number, since it uses less digits than its factorization.

206237689893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13424889 (or 13424883 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

Adding to 206237689893 its sum of digits (63), we get a square (206237689956 = 454134²).

The spelling of 206237689893 in words is "two hundred six billion, two hundred thirty-seven million, six hundred eighty-nine thousand, eight hundred ninety-three".