20690822 has 8 divisors (see below), whose sum is σ = 31094616. Its totient is φ = 10325952.

The previous prime is 20690797. The next prime is 20690827. The reversal of 20690822 is 22809602.

It is a happy number.

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

It is a super-2 number, since 2×20690822² = 856220230071368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20690827) 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, 8363 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (3886827).

Almost surely, 2^20690822 is an apocalyptic number.

20690822 is a deficient number, since it is larger than the sum of its proper divisors (10403794).

20690822 is a wasteful number, since it uses less digits than its factorization.

20690822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19462.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20690822 is about 4548.7165222731. The cubic root of 20690822 is about 274.5317519173.

It can be divided in two parts, 20690 and 822, that added together give a palindrome (21512).

The spelling of 20690822 in words is "twenty million, six hundred ninety thousand, eight hundred twenty-two".