20130138874 has 4 divisors (see below), whose sum is σ = 30195208314. Its totient is φ = 10065069436.

The previous prime is 20130138839. The next prime is 20130138883. The reversal of 20130138874 is 47883103102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47883103102 = 2 ⋅23941551551.

It can be written as a sum of positive squares in only one way, i.e., 17738244225 + 2391894649 = 133185^2 + 48907^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032534717 + ... + 5032534720.

Almost surely, 2^20130138874 is an apocalyptic number.

20130138874 is a deficient number, since it is larger than the sum of its proper divisors (10065069440).

20130138874 is a wasteful number, since it uses less digits than its factorization.

20130138874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10065069439.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 20130138874 in words is "twenty billion, one hundred thirty million, one hundred thirty-eight thousand, eight hundred seventy-four".