19790213919 has 16 divisors (see below), whose sum is σ = 30857832192. Its totient is φ = 11045700288.

The previous prime is 19790213881. The next prime is 19790213921. The reversal of 19790213919 is 91931209791.

It is not a de Polignac number, because 19790213919 - 2¹³ = 19790205727 is a prime.

It is a super-2 number, since 2×19790213919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19790213929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10957134 + ... + 10958939.

It is an arithmetic number, because the mean of its divisors is an integer number (1928614512).

Almost surely, 2^19790213919 is an apocalyptic number.

19790213919 is a deficient number, since it is larger than the sum of its proper divisors (11067618273).

19790213919 is a wasteful number, since it uses less digits than its factorization.

19790213919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21916126.

The product of its (nonzero) digits is 275562, while the sum is 51.

The spelling of 19790213919 in words is "nineteen billion, seven hundred ninety million, two hundred thirteen thousand, nine hundred nineteen".