20700769 has 4 divisors (see below), whose sum is σ = 20710080. Its totient is φ = 20691460.

The previous prime is 20700763. The next prime is 20700773. The reversal of 20700769 is 96700702.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20700769 - 2⁵ = 20700737 is a prime.

It is a super-2 number, since 2×20700769² = 857043674382722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20700769.

It is not an unprimeable number, because it can be changed into a prime (20700763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852 + ... + 6490.

It is an arithmetic number, because the mean of its divisors is an integer number (5177520).

Almost surely, 2^20700769 is an apocalyptic number.

It is an amenable number.

20700769 is a deficient number, since it is larger than the sum of its proper divisors (9311).

20700769 is an equidigital number, since it uses as much as digits as its factorization.

20700769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9310.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 20700769 is about 4549.8097762434. The cubic root of 20700769 is about 274.5757380843.

The spelling of 20700769 in words is "twenty million, seven hundred thousand, seven hundred sixty-nine".