20726648 has 32 divisors (see below), whose sum is σ = 41202000. Its totient is φ = 9757440.

The previous prime is 20726647. The next prime is 20726653. The reversal of 20726648 is 84662702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726647) 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, 8423 + ... + 10601.

Almost surely, 2^20726648 is an apocalyptic number.

It is an amenable number.

20726648 is a deficient number, since it is larger than the sum of its proper divisors (20475352).

20726648 is a wasteful number, since it uses less digits than its factorization.

20726648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255 (or 2251 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20726648 is about 4552.6528530078. The cubic root of 20726648 is about 274.6901104297.

The spelling of 20726648 in words is "twenty million, seven hundred twenty-six thousand, six hundred forty-eight".