20019238 has 4 divisors (see below), whose sum is σ = 30028860. Its totient is φ = 10009618.

The previous prime is 20019229. The next prime is 20019247. The reversal of 20019238 is 83291002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83291002 = 2 ⋅41645501.

It is an interprime number because it is at equal distance from previous prime (20019229) and next prime (20019247).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5004808 + ... + 5004811.

It is an arithmetic number, because the mean of its divisors is an integer number (7507215).

Almost surely, 2^20019238 is an apocalyptic number.

20019238 is a deficient number, since it is larger than the sum of its proper divisors (10009622).

20019238 is a wasteful number, since it uses less digits than its factorization.

20019238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10009621.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20019238 is about 4474.2863118044. The cubic root of 20019238 is about 271.5287670455.

The spelling of 20019238 in words is "twenty million, nineteen thousand, two hundred thirty-eight".