19485957 has 4 divisors (see below), whose sum is σ = 25981280. Its totient is φ = 12990636.

The previous prime is 19485943. The next prime is 19485959. The reversal of 19485957 is 75958491.

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 19485957 - 2¹¹ = 19483909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19485959) 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, 3247657 + ... + 3247662.

It is an arithmetic number, because the mean of its divisors is an integer number (6495320).

Almost surely, 2^19485957 is an apocalyptic number.

It is an amenable number.

19485957 is a deficient number, since it is larger than the sum of its proper divisors (6495323).

19485957 is an equidigital number, since it uses as much as digits as its factorization.

19485957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495322.

The product of its digits is 453600, while the sum is 48.

The square root of 19485957 is about 4414.2900901504. The cubic root of 19485957 is about 269.0960027334.

The spelling of 19485957 in words is "nineteen million, four hundred eighty-five thousand, nine hundred fifty-seven".