19280055 has 16 divisors (see below), whose sum is σ = 31150080. Its totient is φ = 10182048.

The previous prime is 19280017. The next prime is 19280059. The reversal of 19280055 is 55008291.

It is not a de Polignac number, because 19280055 - 2¹⁰ = 19279031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19280059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4695 + ... + 7784.

It is an arithmetic number, because the mean of its divisors is an integer number (1946880).

Almost surely, 2^19280055 is an apocalyptic number.

19280055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19280055 is a deficient number, since it is larger than the sum of its proper divisors (11870025).

19280055 is a wasteful number, since it uses less digits than its factorization.

19280055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12590.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 19280055 is about 4390.9059429689. The cubic root of 19280055 is about 268.1448268601.

The spelling of 19280055 in words is "nineteen million, two hundred eighty thousand, fifty-five".