20959069 has 4 divisors (see below), whose sum is σ = 21635200. Its totient is φ = 20282940.

The previous prime is 20959021. The next prime is 20959073. The reversal of 20959069 is 96095902.

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 20959069 - 2⁷ = 20958941 is a prime.

It is a super-2 number, since 2×20959069² = 878565146693522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20959369) 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, 338019 + ... + 338080.

It is an arithmetic number, because the mean of its divisors is an integer number (5408800).

Almost surely, 2^20959069 is an apocalyptic number.

It is an amenable number.

20959069 is a deficient number, since it is larger than the sum of its proper divisors (676131).

20959069 is an equidigital number, since it uses as much as digits as its factorization.

20959069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676130.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 20959069 is about 4578.1075784651. The cubic root of 20959069 is about 275.7130541896.

The spelling of 20959069 in words is "twenty million, nine hundred fifty-nine thousand, sixty-nine".