208100002138 has 32 divisors (see below), whose sum is σ = 359764660224. Its totient is φ = 88431098112.

The previous prime is 208100002111. The next prime is 208100002141. The reversal of 208100002138 is 831200001802.

It is a super-2 number, since 2×208100002138² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3047506 + ... + 3115042.

It is an arithmetic number, because the mean of its divisors is an integer number (11242645632).

Almost surely, 2^208100002138 is an apocalyptic number.

208100002138 is a deficient number, since it is larger than the sum of its proper divisors (151664658086).

208100002138 is a wasteful number, since it uses less digits than its factorization.

208100002138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69406.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 208100002138 in words is "two hundred eight billion, one hundred million, two thousand, one hundred thirty-eight".