20765901 has 16 divisors (see below), whose sum is σ = 29899520. Its totient is φ = 12744000.

The previous prime is 20765893. The next prime is 20765909. The reversal of 20765901 is 10956702.

It is an interprime number because it is at equal distance from previous prime (20765893) and next prime (20765909).

It is not a de Polignac number, because 20765901 - 2³ = 20765893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20765909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27276 + ... + 28026.

It is an arithmetic number, because the mean of its divisors is an integer number (1868720).

Almost surely, 2^20765901 is an apocalyptic number.

It is an amenable number.

20765901 is a deficient number, since it is larger than the sum of its proper divisors (9133619).

20765901 is a wasteful number, since it uses less digits than its factorization.

20765901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20765901 is about 4556.9618168249. The cubic root of 20765901 is about 274.8634076480.

The spelling of 20765901 in words is "twenty million, seven hundred sixty-five thousand, nine hundred one".