20019270 has 16 divisors (see below), whose sum is σ = 48046320. Its totient is φ = 5338464.

The previous prime is 20019247. The next prime is 20019271. The reversal of 20019270 is 7291002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019271) 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, 333625 + ... + 333684.

It is an arithmetic number, because the mean of its divisors is an integer number (3002895).

Almost surely, 2^20019270 is an apocalyptic number.

20019270 is an abundant number, since it is smaller than the sum of its proper divisors (28027050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20019270 is a wasteful number, since it uses less digits than its factorization.

20019270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667319.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 20019270 is about 4474.2898877923. The cubic root of 20019270 is about 271.5289117216.

The spelling of 20019270 in words is "twenty million, nineteen thousand, two hundred seventy".