20697122 has 8 divisors (see below), whose sum is σ = 31353372. Its totient is φ = 10246000.

The previous prime is 20697121. The next prime is 20697133. The reversal of 20697122 is 22179602.

It can be written as a sum of positive squares in 2 ways, for example, as 20693401 + 3721 = 4549^2 + 61^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20697121) 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 3 ways as a sum of consecutive naturals, for example, 51029 + ... + 51432.

Almost surely, 2^20697122 is an apocalyptic number.

20697122 is a deficient number, since it is larger than the sum of its proper divisors (10656250).

20697122 is a wasteful number, since it uses less digits than its factorization.

20697122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102564.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20697122 is about 4549.4089726029. The cubic root of 20697122 is about 274.5596124913.

The spelling of 20697122 in words is "twenty million, six hundred ninety-seven thousand, one hundred twenty-two".