20095019 has 4 divisors (see below), whose sum is σ = 22965744. Its totient is φ = 17224296.

The previous prime is 20095013. The next prime is 20095021. The reversal of 20095019 is 91059002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91059002 = 2 ⋅45529501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20095019 is a prime.

It is a super-2 number, since 2×20095019² = 807619577220722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20095013) 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, 1435352 + ... + 1435365.

It is an arithmetic number, because the mean of its divisors is an integer number (5741436).

Almost surely, 2^20095019 is an apocalyptic number.

20095019 is a deficient number, since it is larger than the sum of its proper divisors (2870725).

20095019 is an equidigital number, since it uses as much as digits as its factorization.

20095019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870724.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 20095019 is about 4482.7468141754. The cubic root of 20095019 is about 271.8709514348.

The spelling of 20095019 in words is "twenty million, ninety-five thousand, nineteen".