19550455 has 4 divisors (see below), whose sum is σ = 23460552. Its totient is φ = 15640360.

The previous prime is 19550441. The next prime is 19550471. The reversal of 19550455 is 55405591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55405591 = 919 ⋅60289.

It is not a de Polignac number, because 19550455 - 2²³ = 11161847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19550455.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1955041 + ... + 1955050.

It is an arithmetic number, because the mean of its divisors is an integer number (5865138).

Almost surely, 2^19550455 is an apocalyptic number.

19550455 is a deficient number, since it is larger than the sum of its proper divisors (3910097).

19550455 is an equidigital number, since it uses as much as digits as its factorization.

19550455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910096.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 19550455 is about 4421.5896462698. The cubic root of 19550455 is about 269.3925759639.

The spelling of 19550455 in words is "nineteen million, five hundred fifty thousand, four hundred fifty-five".