20764671 has 8 divisors (see below), whose sum is σ = 27846960. Its totient is φ = 13762752.

The previous prime is 20764651. The next prime is 20764673. The reversal of 20764671 is 17646702.

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

It is not a de Polignac number, because 20764671 - 2⁷ = 20764543 is a prime.

20764671 is a modest number, since divided by 4671 gives 2076 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19486 + ... + 20523.

It is an arithmetic number, because the mean of its divisors is an integer number (3480870).

Almost surely, 2^20764671 is an apocalyptic number.

20764671 is a deficient number, since it is larger than the sum of its proper divisors (7082289).

20764671 is a wasteful number, since it uses less digits than its factorization.

20764671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40185.

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

The square root of 20764671 is about 4556.8268564869. The cubic root of 20764671 is about 274.8579806635.

It can be divided in two parts, 2076 and 4671, that multiplied together give a square (9696996 = 3114²).

The spelling of 20764671 in words is "twenty million, seven hundred sixty-four thousand, six hundred seventy-one".