20061019 has 4 divisors (see below), whose sum is σ = 21884760. Its totient is φ = 18237280.

The previous prime is 20061007. The next prime is 20061049. The reversal of 20061019 is 91016002.

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 20061019 - 2⁷ = 20060891 is a prime.

It is a super-2 number, since 2×20061019² = 804888966636722, 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 = 20060987 and 20061005.

It is not an unprimeable number, because it can be changed into a prime (20061049) 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 3 ways as a sum of consecutive naturals, for example, 911854 + ... + 911875.

It is an arithmetic number, because the mean of its divisors is an integer number (5471190).

Almost surely, 2^20061019 is an apocalyptic number.

20061019 is a deficient number, since it is larger than the sum of its proper divisors (1823741).

20061019 is a wasteful number, since it uses less digits than its factorization.

20061019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823740.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 20061019 is about 4478.9528910226. The cubic root of 20061019 is about 271.7175331419.

It can be divided in two parts, 2006 and 1019, that added together give a square (3025 = 55²).

The spelling of 20061019 in words is "twenty million, sixty-one thousand, nineteen".