20628597 has 8 divisors (see below), whose sum is σ = 30005280. Its totient is φ = 12502160.

The previous prime is 20628589. The next prime is 20628611. The reversal of 20628597 is 79582602.

It is a happy number.

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

It is not a de Polignac number, because 20628597 - 2³ = 20628589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628557) 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, 312522 + ... + 312587.

It is an arithmetic number, because the mean of its divisors is an integer number (3750660).

Almost surely, 2^20628597 is an apocalyptic number.

It is an amenable number.

20628597 is a deficient number, since it is larger than the sum of its proper divisors (9376683).

20628597 is a wasteful number, since it uses less digits than its factorization.

20628597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625123.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 20628597 is about 4541.8715305477. The cubic root of 20628597 is about 274.2562691993.

The spelling of 20628597 in words is "twenty million, six hundred twenty-eight thousand, five hundred ninety-seven".