205237972837 has 16 divisors (see below), whose sum is σ = 208746502272. Its totient is φ = 201762635200.

The previous prime is 205237972801. The next prime is 205237972883. The reversal of 205237972837 is 738279732502.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205237972837 is a prime.

It is a super-2 number, since 2×205237972837² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205237972237) 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, 9997938 + ... + 10018444.

It is an arithmetic number, because the mean of its divisors is an integer number (13046656392).

Almost surely, 2^205237972837 is an apocalyptic number.

It is an amenable number.

205237972837 is a deficient number, since it is larger than the sum of its proper divisors (3508529435).

205237972837 is a wasteful number, since it uses less digits than its factorization.

205237972837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21308.

The product of its (nonzero) digits is 8890560, while the sum is 55.

The spelling of 205237972837 in words is "two hundred five billion, two hundred thirty-seven million, nine hundred seventy-two thousand, eight hundred thirty-seven".