20368506138874 has 4 divisors (see below), whose sum is σ = 30552759208314. Its totient is φ = 10184253069436.

The previous prime is 20368506138839. The next prime is 20368506138961. The reversal of 20368506138874 is 47883160586302.

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., 20361076905625 + 7429233249 = 4512325^2 + 86193^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5092126534717 + ... + 5092126534720.

Almost surely, 2^{20368506138874} is an apocalyptic number.

20368506138874 is a deficient number, since it is larger than the sum of its proper divisors (10184253069440).

20368506138874 is a wasteful number, since it uses less digits than its factorization.

20368506138874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10184253069439.

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 20368506138874 in words is "twenty trillion, three hundred sixty-eight billion, five hundred six million, one hundred thirty-eight thousand, eight hundred seventy-four".