19055550 has 24 divisors (see below), whose sum is σ = 47258136. Its totient is φ = 5081440.

The previous prime is 19055549. The next prime is 19055557. The reversal of 19055550 is 5555091.

It is a super-2 number, since 2×19055550² = 726227971605000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19055557) 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 11 ways as a sum of consecutive naturals, for example, 63369 + ... + 63668.

It is an arithmetic number, because the mean of its divisors is an integer number (1969089).

Almost surely, 2^19055550 is an apocalyptic number.

19055550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19055550 is an abundant number, since it is smaller than the sum of its proper divisors (28202586).

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

19055550 is a wasteful number, since it uses less digits than its factorization.

19055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127052 (or 127047 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 30.

The square root of 19055550 is about 4365.2663148999. The cubic root of 19055550 is about 267.0999639719.

The spelling of 19055550 in words is "nineteen million, fifty-five thousand, five hundred fifty".