20690267 has 8 divisors (see below), whose sum is σ = 22800624. Its totient is φ = 18654048.

The previous prime is 20690261. The next prime is 20690279. The reversal of 20690267 is 76209602.

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 20690267 - 2⁴ = 20690251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20690261) 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, 17948 + ... + 19065.

It is an arithmetic number, because the mean of its divisors is an integer number (2850078).

Almost surely, 2^20690267 is an apocalyptic number.

20690267 is a deficient number, since it is larger than the sum of its proper divisors (2110357).

20690267 is a wasteful number, since it uses less digits than its factorization.

20690267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37069.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20690267 is about 4548.6555156442. The cubic root of 20690267 is about 274.5292972624.

Adding to 20690267 its reverse (76209602), we get a palindrome (96899869).

The spelling of 20690267 in words is "twenty million, six hundred ninety thousand, two hundred sixty-seven".