19220236 has 12 divisors (see below), whose sum is σ = 38440528. Its totient is φ = 8237232.

The previous prime is 19220233. The next prime is 19220239. The reversal of 19220236 is 63202291.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19220233) and next prime (19220239).

19220236 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 19220236.

It is not an unprimeable number, because it can be changed into a prime (19220231) 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, 343191 + ... + 343246.

Almost surely, 2^19220236 is an apocalyptic number.

It is an amenable number.

19220236 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19220236 is a wasteful number, since it uses less digits than its factorization.

19220236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686448 (or 686446 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 19220236 is about 4384.0889589514. The cubic root of 19220236 is about 267.8672209271.

The spelling of 19220236 in words is "nineteen million, two hundred twenty thousand, two hundred thirty-six".