20726684 has 12 divisors (see below), whose sum is σ = 39569208. Its totient is φ = 9421200.

The previous prime is 20726683. The next prime is 20726711. The reversal of 20726684 is 48662702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235487 + ... + 235574.

It is an arithmetic number, because the mean of its divisors is an integer number (3297434).

Almost surely, 2^20726684 is an apocalyptic number.

It is an amenable number.

20726684 is a deficient number, since it is larger than the sum of its proper divisors (18842524).

20726684 is a wasteful number, since it uses less digits than its factorization.

20726684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471076 (or 471074 counting only the distinct ones).

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

The square root of 20726684 is about 4552.6568067448. The cubic root of 20726684 is about 274.6902694655.

The spelling of 20726684 in words is "twenty million, seven hundred twenty-six thousand, six hundred eighty-four".