19834920145 has 4 divisors (see below), whose sum is σ = 23801904180. Its totient is φ = 15867936112.

The previous prime is 19834920121. The next prime is 19834920163. The reversal of 19834920145 is 54102943891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8617780224 + 11217139921 = 92832^2 + 105911^2 .

It is a cyclic number.

It is not a de Polignac number, because 19834920145 - 2²¹ = 19832822993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19834920095 and 19834920104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1983492010 + ... + 1983492019.

It is an arithmetic number, because the mean of its divisors is an integer number (5950476045).

Almost surely, 2^19834920145 is an apocalyptic number.

It is an amenable number.

19834920145 is a deficient number, since it is larger than the sum of its proper divisors (3966984035).

19834920145 is an equidigital number, since it uses as much as digits as its factorization.

19834920145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966984034.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 19834920145 in words is "nineteen billion, eight hundred thirty-four million, nine hundred twenty thousand, one hundred forty-five".