19925013 has 4 divisors (see below), whose sum is σ = 26566688. Its totient is φ = 13283340.

The previous prime is 19925011. The next prime is 19925021. The reversal of 19925013 is 31052991.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31052991 = 3 ⋅10350997.

It is not a de Polignac number, because 19925013 - 2¹ = 19925011 is a prime.

It is a super-2 number, since 2×19925013² = 794012286100338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19925011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3320833 + ... + 3320838.

It is an arithmetic number, because the mean of its divisors is an integer number (6641672).

Almost surely, 2^19925013 is an apocalyptic number.

It is an amenable number.

19925013 is a deficient number, since it is larger than the sum of its proper divisors (6641675).

19925013 is an equidigital number, since it uses as much as digits as its factorization.

19925013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6641674.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 19925013 is about 4463.7442803100. The cubic root of 19925013 is about 271.1020934037.

The spelling of 19925013 in words is "nineteen million, nine hundred twenty-five thousand, thirteen".