20722126 has 8 divisors (see below), whose sum is σ = 32434704. Its totient is φ = 9910560.

The previous prime is 20722123. The next prime is 20722129. The reversal of 20722126 is 62122702.

It is an interprime number because it is at equal distance from previous prime (20722123) and next prime (20722129).

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

It is a junction number, because it is equal to n+sod(n) for n = 20722097 and 20722106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20722123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225195 + ... + 225286.

It is an arithmetic number, because the mean of its divisors is an integer number (4054338).

Almost surely, 2^20722126 is an apocalyptic number.

20722126 is a deficient number, since it is larger than the sum of its proper divisors (11712578).

20722126 is a wasteful number, since it uses less digits than its factorization.

20722126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450506.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20722126 is about 4552.1561923994. The cubic root of 20722126 is about 274.6701322994.

Adding to 20722126 its reverse (62122702), we get a palindrome (82844828).

The spelling of 20722126 in words is "twenty million, seven hundred twenty-two thousand, one hundred twenty-six".