20797736 has 32 divisors (see below), whose sum is σ = 40068000. Its totient is φ = 10117056.

The previous prime is 20797729. The next prime is 20797739. The reversal of 20797736 is 63779702.

It is a junction number, because it is equal to n+sod(n) for n = 20797693 and 20797702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20797739) 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, 65450 + ... + 65766.

It is an arithmetic number, because the mean of its divisors is an integer number (1252125).

Almost surely, 2^20797736 is an apocalyptic number.

It is an amenable number.

20797736 is a deficient number, since it is larger than the sum of its proper divisors (19270264).

20797736 is a wasteful number, since it uses less digits than its factorization.

20797736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 20797736 is about 4560.4534862226. The cubic root of 20797736 is about 275.0037949890.

The spelling of 20797736 in words is "twenty million, seven hundred ninety-seven thousand, seven hundred thirty-six".