20764761 has 8 divisors (see below), whose sum is σ = 28579584. Its totient is φ = 13396560.

The previous prime is 20764759. The next prime is 20764763. The reversal of 20764761 is 16746702.

It is an interprime number because it is at equal distance from previous prime (20764759) and next prime (20764763).

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

It is not a de Polignac number, because 20764761 - 2¹ = 20764759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20764763) 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, 111546 + ... + 111731.

It is an arithmetic number, because the mean of its divisors is an integer number (3572448).

Almost surely, 2^20764761 is an apocalyptic number.

It is an amenable number.

20764761 is a deficient number, since it is larger than the sum of its proper divisors (7814823).

20764761 is a wasteful number, since it uses less digits than its factorization.

20764761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223311.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20764761 is about 4556.8367317691. The cubic root of 20764761 is about 274.8583777672.

The spelling of 20764761 in words is "twenty million, seven hundred sixty-four thousand, seven hundred sixty-one".