20690067 has 8 divisors (see below), whose sum is σ = 28332496. Its totient is φ = 13420512.

The previous prime is 20690057. The next prime is 20690077. The reversal of 20690067 is 76009602.

It is an interprime number because it is at equal distance from previous prime (20690057) and next prime (20690077).

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

It is not a de Polignac number, because 20690067 - 2¹² = 20685971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20690017) 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, 93088 + ... + 93309.

It is an arithmetic number, because the mean of its divisors is an integer number (3541562).

Almost surely, 2^20690067 is an apocalyptic number.

20690067 is a deficient number, since it is larger than the sum of its proper divisors (7642429).

20690067 is a wasteful number, since it uses less digits than its factorization.

20690067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186437.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20690067 is about 4548.6335310728. The cubic root of 20690067 is about 274.5284126913.

Adding to 20690067 its reverse (76009602), we get a palindrome (96699669).

The spelling of 20690067 in words is "twenty million, six hundred ninety thousand, sixty-seven".