20825697 has 8 divisors (see below), whose sum is σ = 29401056. Its totient is φ = 13067072.

The previous prime is 20825689. The next prime is 20825699. The reversal of 20825697 is 79652802.

It is a happy number.

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 20825697 - 2³ = 20825689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20825699) 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, 204123 + ... + 204224.

It is an arithmetic number, because the mean of its divisors is an integer number (3675132).

Almost surely, 2^20825697 is an apocalyptic number.

It is an amenable number.

20825697 is a deficient number, since it is larger than the sum of its proper divisors (8575359).

20825697 is a wasteful number, since it uses less digits than its factorization.

20825697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408367.

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

The square root of 20825697 is about 4563.5180508025. The cubic root of 20825697 is about 275.1269804766.

The spelling of 20825697 in words is "twenty million, eight hundred twenty-five thousand, six hundred ninety-seven".