19955230 has 16 divisors (see below), whose sum is σ = 36195984. Its totient is φ = 7920640.

The previous prime is 19955209. The next prime is 19955231. The reversal of 19955230 is 3255991.

It is a happy number.

It is a super-2 number, since 2×19955230² = 796422408705800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19955231) 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 7 ways as a sum of consecutive naturals, for example, 6307 + ... + 8926.

It is an arithmetic number, because the mean of its divisors is an integer number (2262249).

Almost surely, 2^19955230 is an apocalyptic number.

19955230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19955230 is a deficient number, since it is larger than the sum of its proper divisors (16240754).

19955230 is a wasteful number, since it uses less digits than its factorization.

19955230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15371.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 19955230 is about 4467.1277125240. The cubic root of 19955230 is about 271.2390695476.

It can be divided in two parts, 1995 and 5230, that added together give a square (7225 = 85²).

The spelling of 19955230 in words is "nineteen million, nine hundred fifty-five thousand, two hundred thirty".