20019331 has 8 divisors (see below), whose sum is σ = 21643280. Its totient is φ = 18452448.

The previous prime is 20019313. The next prime is 20019341. The reversal of 20019331 is 13391002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20019331 - 2⁵ = 20019299 is a prime.

It is a super-2 number, since 2×20019331² = 801547227375122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 20019299 and 20019308.

It is not an unprimeable number, because it can be changed into a prime (20019341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13536 + ... + 14941.

It is an arithmetic number, because the mean of its divisors is an integer number (2705410).

Almost surely, 2^20019331 is an apocalyptic number.

20019331 is a deficient number, since it is larger than the sum of its proper divisors (1623949).

20019331 is a wasteful number, since it uses less digits than its factorization.

20019331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28533.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 20019331 is about 4474.2967045112. The cubic root of 20019331 is about 271.5291875100.

The spelling of 20019331 in words is "twenty million, nineteen thousand, three hundred thirty-one".