20620867 has 8 divisors (see below), whose sum is σ = 21172752. Its totient is φ = 20076000.

The previous prime is 20620861. The next prime is 20620879. The reversal of 20620867 is 76802602.

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 a de Polignac number, because none of the positive numbers 2^k-20620867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20620861) 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, 4488 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (2646594).

Almost surely, 2^20620867 is an apocalyptic number.

20620867 is a deficient number, since it is larger than the sum of its proper divisors (551885).

20620867 is a wasteful number, since it uses less digits than its factorization.

20620867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20620867 is about 4541.0204800243. The cubic root of 20620867 is about 274.2220082521. Note that the first 3 decimals are identical.

The spelling of 20620867 in words is "twenty million, six hundred twenty thousand, eight hundred sixty-seven".