20807697 has 8 divisors (see below), whose sum is σ = 27946656. Its totient is φ = 13770272.

The previous prime is 20807693. The next prime is 20807713. The reversal of 20807697 is 79670802.

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 20807697 - 2² = 20807693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20807693) 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, 24903 + ... + 25724.

It is an arithmetic number, because the mean of its divisors is an integer number (3493332).

Almost surely, 2^20807697 is an apocalyptic number.

It is an amenable number.

20807697 is a deficient number, since it is larger than the sum of its proper divisors (7138959).

20807697 is a wasteful number, since it uses less digits than its factorization.

20807697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50767.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 20807697 is about 4561.5454617925. The cubic root of 20807697 is about 275.0476920040.

The spelling of 20807697 in words is "twenty million, eight hundred seven thousand, six hundred ninety-seven".