20726236 has 6 divisors (see below), whose sum is σ = 36270920. Its totient is φ = 10363116.

The previous prime is 20726191. The next prime is 20726239. The reversal of 20726236 is 63262702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590776 + ... + 2590783.

Almost surely, 2^20726236 is an apocalyptic number.

It is an amenable number.

20726236 is a deficient number, since it is larger than the sum of its proper divisors (15544684).

20726236 is a wasteful number, since it uses less digits than its factorization.

20726236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181563 (or 5181561 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 20726236 is about 4552.6076044395. The cubic root of 20726236 is about 274.6882903400.

Adding to 20726236 its reverse (63262702), we get a palindrome (83988938).

The spelling of 20726236 in words is "twenty million, seven hundred twenty-six thousand, two hundred thirty-six".