20192019 has 16 divisors (see below), whose sum is σ = 27531552. Its totient is φ = 13160448.

The previous prime is 20191987. The next prime is 20192023. The reversal of 20192019 is 91029102.

It is not a de Polignac number, because 20192019 - 2⁵ = 20191987 is a prime.

It is a super-2 number, since 2×20192019² = 815435262592722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20192019.

It is not an unprimeable number, because it can be changed into a prime (20192119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29667 + ... + 30339.

It is an arithmetic number, because the mean of its divisors is an integer number (1720722).

Almost surely, 2^20192019 is an apocalyptic number.

20192019 is a deficient number, since it is larger than the sum of its proper divisors (7339533).

20192019 is a wasteful number, since it uses less digits than its factorization.

20192019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 20192019 is about 4493.5530485352. The cubic root of 20192019 is about 272.3076958741.

The spelling of 20192019 in words is "twenty million, one hundred ninety-two thousand, nineteen".