19555146 has 48 divisors (see below), whose sum is σ = 45971016. Its totient is φ = 5971968.

The previous prime is 19555139. The next prime is 19555147. The reversal of 19555146 is 64155591.

It can be written as a sum of positive squares in 4 ways, for example, as 6702921 + 12852225 = 2589^2 + 3585^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19555146.

It is not an unprimeable number, because it can be changed into a prime (19555147) 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 23 ways as a sum of consecutive naturals, for example, 44946 + ... + 45378.

Almost surely, 2^19555146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19555146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22985508).

19555146 is an abundant number, since it is smaller than the sum of its proper divisors (26415870).

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

19555146 is a wasteful number, since it uses less digits than its factorization.

19555146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 644 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 19555146 is about 4422.1200797807. The cubic root of 19555146 is about 269.4141205522.

It can be divided in two parts, 19555 and 146, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 19555146 in words is "nineteen million, five hundred fifty-five thousand, one hundred forty-six".