20697796 has 18 divisors (see below), whose sum is σ = 42135198. Its totient is φ = 8870400.

The previous prime is 20697779. The next prime is 20697797. The reversal of 20697796 is 69779602.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 122500 = 4536^2 + 350^2 .

It is not an unprimeable number, because it can be changed into a prime (20697797) 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 5 ways as a sum of consecutive naturals, for example, 52605 + ... + 52996.

Almost surely, 2^20697796 is an apocalyptic number.

It is an amenable number.

20697796 is an abundant number, since it is smaller than the sum of its proper divisors (21437402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20697796 is a wasteful number, since it uses less digits than its factorization.

20697796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105619 (or 105610 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 20697796 is about 4549.4830475561. The cubic root of 20697796 is about 274.5625927956.

The spelling of 20697796 in words is "twenty million, six hundred ninety-seven thousand, seven hundred ninety-six".