215020737868 has 24 divisors (see below), whose sum is σ = 389911047680. Its totient is φ = 103680879120.

The previous prime is 215020737863. The next prime is 215020737889. The reversal of 215020737868 is 868737020512.

It is not an unprimeable number, because it can be changed into a prime (215020737863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7898568 + ... + 7925743.

Almost surely, 2^215020737868 is an apocalyptic number.

It is an amenable number.

215020737868 is a deficient number, since it is larger than the sum of its proper divisors (174890309812).

215020737868 is a wasteful number, since it uses less digits than its factorization.

215020737868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15824437 (or 15824435 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 215020737868 in words is "two hundred fifteen billion, twenty million, seven hundred thirty-seven thousand, eight hundred sixty-eight".