20258019 has 20 divisors (see below), whose sum is σ = 30387456. Its totient is φ = 13449456.

The previous prime is 20257997. The next prime is 20258023. The reversal of 20258019 is 91085202.

It is not a de Polignac number, because 20258019 - 2⁸ = 20257763 is a prime.

It is a super-2 number, since 2×20258019² = 820774667608722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

20258019 is a modest number, since divided by 8019 gives 2025 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20257983 and 20258001.

It is not an unprimeable number, because it can be changed into a prime (20258089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30697 + ... + 31349.

Almost surely, 2^20258019 is an apocalyptic number.

20258019 is a deficient number, since it is larger than the sum of its proper divisors (10129437).

20258019 is an equidigital number, since it uses as much as digits as its factorization.

20258019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20258019 is about 4500.8909118085. The cubic root of 20258019 is about 272.6040631644.

The spelling of 20258019 in words is "twenty million, two hundred fifty-eight thousand, nineteen".