20010110138 has 4 divisors (see below), whose sum is σ = 30015165210. Its totient is φ = 10005055068.

The previous prime is 20010110137. The next prime is 20010110161. The reversal of 20010110138 is 83101101002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18799974769 + 1210135369 = 137113^2 + 34787^2 .

It is not an unprimeable number, because it can be changed into a prime (20010110137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002527533 + ... + 5002527536.

Almost surely, 2^20010110138 is an apocalyptic number.

20010110138 is a deficient number, since it is larger than the sum of its proper divisors (10005055072).

20010110138 is a wasteful number, since it uses less digits than its factorization.

20010110138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005055071.

The product of its (nonzero) digits is 48, while the sum is 17.

The spelling of 20010110138 in words is "twenty billion, ten million, one hundred ten thousand, one hundred thirty-eight".