20736712 has 8 divisors (see below), whose sum is σ = 38881350. Its totient is φ = 10368352.

The previous prime is 20736691. The next prime is 20736713. The reversal of 20736712 is 21763702.

It can be written as a sum of positive squares in only one way, i.e., 17589636 + 3147076 = 4194^2 + 1774^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20736712² = 860022449141888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20736713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1296037 + ... + 1296052.

Almost surely, 2^20736712 is an apocalyptic number.

It is an amenable number.

20736712 is a deficient number, since it is larger than the sum of its proper divisors (18144638).

20736712 is a wasteful number, since it uses less digits than its factorization.

20736712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592095 (or 2592091 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 20736712 is about 4553.7580085024. The cubic root of 20736712 is about 274.7345626079.

The spelling of 20736712 in words is "twenty million, seven hundred thirty-six thousand, seven hundred twelve".