25013819 has 4 divisors (see below), whose sum is σ = 25033560. Its totient is φ = 24994080.

The previous prime is 25013803. The next prime is 25013893. The reversal of 25013819 is 91831052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25013819 - 2⁴ = 25013803 is a prime.

It is a super-2 number, since 2×25013819² = 1251382281929522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25013791 and 25013800.

It is not an unprimeable number, because it can be changed into a prime (25010819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7829 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (6258390).

Almost surely, 2^25013819 is an apocalyptic number.

25013819 is a deficient number, since it is larger than the sum of its proper divisors (19741).

25013819 is a wasteful number, since it uses less digits than its factorization.

25013819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19740.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 25013819 is about 5001.3817090880. The cubic root of 25013819 is about 292.4556398990.

The spelling of 25013819 in words is "twenty-five million, thirteen thousand, eight hundred nineteen".