20975069 has 8 divisors (see below), whose sum is σ = 22155840. Its totient is φ = 19802016.

The previous prime is 20975063. The next prime is 20975081. The reversal of 20975069 is 96057902.

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

It is a cyclic number.

It is not a de Polignac number, because 20975069 - 2⁸ = 20974813 is a prime.

It is a super-2 number, since 2×20975069² = 879907039109522, 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 (20975063) 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, 4184 + ... + 7710.

It is an arithmetic number, because the mean of its divisors is an integer number (2769480).

Almost surely, 2^20975069 is an apocalyptic number.

It is an amenable number.

20975069 is a deficient number, since it is larger than the sum of its proper divisors (1180771).

20975069 is a wasteful number, since it uses less digits than its factorization.

20975069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 20975069 is about 4579.8546920181. The cubic root of 20975069 is about 275.7831954540.

The spelling of 20975069 in words is "twenty million, nine hundred seventy-five thousand, sixty-nine".