20764835 has 32 divisors (see below), whose sum is σ = 31352832. Its totient is φ = 12850560.

The previous prime is 20764813. The next prime is 20764847. The reversal of 20764835 is 53846702.

It is a happy number.

It is not a de Polignac number, because 20764835 - 2⁶ = 20764771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a junction number, because it is equal to n+sod(n) for n = 20764795 and 20764804.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 20900 + ... + 21870.

It is an arithmetic number, because the mean of its divisors is an integer number (979776).

Almost surely, 2^20764835 is an apocalyptic number.

20764835 is a deficient number, since it is larger than the sum of its proper divisors (10587997).

20764835 is a wasteful number, since it uses less digits than its factorization.

20764835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20764835 is about 4556.8448514296. The cubic root of 20764835 is about 274.8587042738.

The spelling of 20764835 in words is "twenty million, seven hundred sixty-four thousand, eight hundred thirty-five".