207027921138 has 16 divisors (see below), whose sum is σ = 414379591680. Its totient is φ = 68955348816.

The previous prime is 207027921137. The next prime is 207027921143. The reversal of 207027921138 is 831129720702.

It is a self number, because there is not a number n which added to its sum of digits gives 207027921138.

It is not an unprimeable number, because it can be changed into a prime (207027921137) 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, 13481245 + ... + 13496592.

It is an arithmetic number, because the mean of its divisors is an integer number (25898724480).

Almost surely, 2^207027921138 is an apocalyptic number.

207027921138 is an abundant number, since it is smaller than the sum of its proper divisors (207351670542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

207027921138 is a wasteful number, since it uses less digits than its factorization.

207027921138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26979121.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 207027921138 in words is "two hundred seven billion, twenty-seven million, nine hundred twenty-one thousand, one hundred thirty-eight".