20765001 has 8 divisors (see below), whose sum is σ = 28330720. Its totient is φ = 13521312.

The previous prime is 20764999. The next prime is 20765027. The reversal of 20765001 is 10056702.

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

It is not a de Polignac number, because 20765001 - 2¹ = 20764999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20765051) 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, 80356 + ... + 80613.

It is an arithmetic number, because the mean of its divisors is an integer number (3541340).

Almost surely, 2^20765001 is an apocalyptic number.

It is an amenable number.

20765001 is a deficient number, since it is larger than the sum of its proper divisors (7565719).

20765001 is a wasteful number, since it uses less digits than its factorization.

20765001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161015.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20765001 is about 4556.8630657504. The cubic root of 20765001 is about 274.8594367048.

The spelling of 20765001 in words is "twenty million, seven hundred sixty-five thousand, one".