20625513 has 8 divisors (see below), whose sum is σ = 27773376. Its totient is φ = 13614000.

The previous prime is 20625499. The next prime is 20625529. The reversal of 20625513 is 31552602.

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

It is not a de Polignac number, because 20625513 - 2⁸ = 20625257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20625593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33733 + ... + 34338.

It is an arithmetic number, because the mean of its divisors is an integer number (3471672).

Almost surely, 2^20625513 is an apocalyptic number.

It is an amenable number.

20625513 is a deficient number, since it is larger than the sum of its proper divisors (7147863).

20625513 is a wasteful number, since it uses less digits than its factorization.

20625513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68175.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 20625513 is about 4541.5320102362. The cubic root of 20625513 is about 274.2426013044.

The spelling of 20625513 in words is "twenty million, six hundred twenty-five thousand, five hundred thirteen".