19873150051 has 4 divisors (see below), whose sum is σ = 19875985192. Its totient is φ = 19870314912.

The previous prime is 19873150007. The next prime is 19873150061. The reversal of 19873150051 is 15005137891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15005137891 = 47 ⋅319258253.

It is a cyclic number.

It is not a de Polignac number, because 19873150051 - 2¹⁹ = 19872625763 is a prime.

It is a super-2 number, since 2×19873150051² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19873149986 and 19873150013.

It is not an unprimeable number, because it can be changed into a prime (19873150061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407030 + ... + 1421083.

It is an arithmetic number, because the mean of its divisors is an integer number (4968996298).

Almost surely, 2^19873150051 is an apocalyptic number.

19873150051 is a deficient number, since it is larger than the sum of its proper divisors (2835141).

19873150051 is an equidigital number, since it uses as much as digits as its factorization.

19873150051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835140.

The product of its (nonzero) digits is 37800, while the sum is 40.

The spelling of 19873150051 in words is "nineteen billion, eight hundred seventy-three million, one hundred fifty thousand, fifty-one".