20825013 has 8 divisors (see below), whose sum is σ = 30290976. Its totient is φ = 12621200.

The previous prime is 20825011. The next prime is 20825023. The reversal of 20825013 is 31052802.

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

It is a cyclic number.

It is not a de Polignac number, because 20825013 - 2¹ = 20825011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825011) 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, 315498 + ... + 315563.

It is an arithmetic number, because the mean of its divisors is an integer number (3786372).

Almost surely, 2^20825013 is an apocalyptic number.

It is an amenable number.

20825013 is a deficient number, since it is larger than the sum of its proper divisors (9465963).

20825013 is a wasteful number, since it uses less digits than its factorization.

20825013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631075.

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

The square root of 20825013 is about 4563.4431080052. The cubic root of 20825013 is about 275.1239683498.

Adding to 20825013 its reverse (31052802), we get a palindrome (51877815).

The spelling of 20825013 in words is "twenty million, eight hundred twenty-five thousand, thirteen".