19500053 has 4 divisors (see below), whose sum is σ = 19819788. Its totient is φ = 19180320.

The previous prime is 19500049. The next prime is 19500059. The reversal of 19500053 is 35000591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35000591 = 283 ⋅123677.

It can be written as a sum of positive squares in 2 ways, for example, as 9721924 + 9778129 = 3118^2 + 3127^2 .

It is a cyclic number.

It is not a de Polignac number, because 19500053 - 2² = 19500049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19500059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159776 + ... + 159897.

It is an arithmetic number, because the mean of its divisors is an integer number (4954947).

Almost surely, 2^19500053 is an apocalyptic number.

It is an amenable number.

19500053 is a deficient number, since it is larger than the sum of its proper divisors (319735).

19500053 is an equidigital number, since it uses as much as digits as its factorization.

19500053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319734.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 19500053 is about 4415.8864342281. The cubic root of 19500053 is about 269.1608744591.

The spelling of 19500053 in words is "nineteen million, five hundred thousand, fifty-three".