20800769 has 8 divisors (see below), whose sum is σ = 22739808. Its totient is φ = 18869760.

The previous prime is 20800739. The next prime is 20800807. The reversal of 20800769 is 96700802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20800769 is a prime.

It is a super-2 number, since 2×20800769² = 865343981982722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20800709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4289 + ... + 7745.

It is an arithmetic number, because the mean of its divisors is an integer number (2842476).

Almost surely, 2^20800769 is an apocalyptic number.

It is an amenable number.

20800769 is a deficient number, since it is larger than the sum of its proper divisors (1939039).

20800769 is a wasteful number, since it uses less digits than its factorization.

20800769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20800769 is about 4560.7860068194. The cubic root of 20800769 is about 275.0171625652.

The spelling of 20800769 in words is "twenty million, eight hundred thousand, seven hundred sixty-nine".