20680269 has 4 divisors (see below), whose sum is σ = 27573696. Its totient is φ = 13786844.

The previous prime is 20680259. The next prime is 20680271. The reversal of 20680269 is 96208602.

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.

It is a cyclic number.

It is not a de Polignac number, because 20680269 - 2¹⁶ = 20614733 is a prime.

It is a super-2 number, since 2×20680269² = 855347051824722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680249) 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, 3446709 + ... + 3446714.

It is an arithmetic number, because the mean of its divisors is an integer number (6893424).

Almost surely, 2^20680269 is an apocalyptic number.

It is an amenable number.

20680269 is a deficient number, since it is larger than the sum of its proper divisors (6893427).

20680269 is an equidigital number, since it uses as much as digits as its factorization.

20680269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6893426.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20680269 is about 4547.5563767808. The cubic root of 20680269 is about 274.4850705713.

The spelling of 20680269 in words is "twenty million, six hundred eighty thousand, two hundred sixty-nine".