25020813 has 8 divisors (see below), whose sum is σ = 34437376. Its totient is φ = 16142400.

The previous prime is 25020811. The next prime is 25020887. The reversal of 25020813 is 31802052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25020813 - 2¹ = 25020811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25020813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25020811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134428 + ... + 134613.

It is an arithmetic number, because the mean of its divisors is an integer number (4304672).

Almost surely, 2^25020813 is an apocalyptic number.

It is an amenable number.

25020813 is a deficient number, since it is larger than the sum of its proper divisors (9416563).

25020813 is a wasteful number, since it uses less digits than its factorization.

25020813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269075.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 25020813 is about 5002.0808669993. The cubic root of 25020813 is about 292.4828947554.

Adding to 25020813 its reverse (31802052), we get a palindrome (56822865).

The spelling of 25020813 in words is "twenty-five million, twenty thousand, eight hundred thirteen".