19530057 has 4 divisors (see below), whose sum is σ = 26040080. Its totient is φ = 13020036.

The previous prime is 19530047. The next prime is 19530073. The reversal of 19530057 is 75003591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19530057 - 2²² = 15335753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19530037) 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, 3255007 + ... + 3255012.

It is an arithmetic number, because the mean of its divisors is an integer number (6510020).

Almost surely, 2^19530057 is an apocalyptic number.

It is an amenable number.

19530057 is a deficient number, since it is larger than the sum of its proper divisors (6510023).

19530057 is an equidigital number, since it uses as much as digits as its factorization.

19530057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510022.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 19530057 is about 4419.2824078124. The cubic root of 19530057 is about 269.2988529624.

The spelling of 19530057 in words is "nineteen million, five hundred thirty thousand, fifty-seven".