20541019 has 4 divisors (see below), whose sum is σ = 21249360. Its totient is φ = 19832680.

The previous prime is 20541013. The next prime is 20541023. The reversal of 20541019 is 91014502.

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

It is a cyclic number.

It is not a de Polignac number, because 20541019 - 2¹⁵ = 20508251 is a prime.

It is a super-2 number, since 2×20541019² = 843866923116722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20541013) 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, 354127 + ... + 354184.

It is an arithmetic number, because the mean of its divisors is an integer number (5312340).

Almost surely, 2^20541019 is an apocalyptic number.

20541019 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20541019 is a deficient number, since it is larger than the sum of its proper divisors (708341).

20541019 is an equidigital number, since it uses as much as digits as its factorization.

20541019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708340.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 20541019 is about 4532.2200961560. The cubic root of 20541019 is about 273.8676034668.

The spelling of 20541019 in words is "twenty million, five hundred forty-one thousand, nineteen".