20675769 has 8 divisors (see below), whose sum is σ = 27733440. Its totient is φ = 13700976.

The previous prime is 20675761. The next prime is 20675779. The reversal of 20675769 is 96757602.

It is a happy number.

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

It is not a de Polignac number, because 20675769 - 2³ = 20675761 is a prime.

It is a super-2 number, since 2×20675769² = 854974847482722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20675769.

It is not an unprimeable number, because it can be changed into a prime (20675761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20134 + ... + 21135.

It is an arithmetic number, because the mean of its divisors is an integer number (3466680).

Almost surely, 2^20675769 is an apocalyptic number.

It is an amenable number.

20675769 is a deficient number, since it is larger than the sum of its proper divisors (7057671).

20675769 is a wasteful number, since it uses less digits than its factorization.

20675769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41439.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 20675769 is about 4547.0615786461. The cubic root of 20675769 is about 274.4651599274.

The spelling of 20675769 in words is "twenty million, six hundred seventy-five thousand, seven hundred sixty-nine".