20353019 has 6 divisors (see below), whose sum is σ = 21031740. Its totient is φ = 19695540.

The previous prime is 20352991. The next prime is 20353027. The reversal of 20353019 is 91035302.

It is a happy number.

It is not a de Polignac number, because 20353019 - 2⁸ = 20352763 is a prime.

It is a super-2 number, since 2×20353019² = 828490764828722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20352985 and 20353003.

It is not an unprimeable number, because it can be changed into a prime (20353049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9629 + ... + 11550.

It is an arithmetic number, because the mean of its divisors is an integer number (3505290).

Almost surely, 2^20353019 is an apocalyptic number.

20353019 is a deficient number, since it is larger than the sum of its proper divisors (678721).

20353019 is an equidigital number, since it uses as much as digits as its factorization.

20353019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21241 (or 21210 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 20353019 is about 4511.4320342880. The cubic root of 20353019 is about 273.0295244628.

The spelling of 20353019 in words is "twenty million, three hundred fifty-three thousand, nineteen".