20726028 has 18 divisors (see below), whose sum is σ = 52390884. Its totient is φ = 6908664.

The previous prime is 20725993. The next prime is 20726029. The reversal of 20726028 is 82062702.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 20725992 and 20726010.

It is not an unprimeable number, because it can be changed into a prime (20726029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 287826 + ... + 287897.

Almost surely, 2^20726028 is an apocalyptic number.

It is an amenable number.

20726028 is an abundant number, since it is smaller than the sum of its proper divisors (31664856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20726028 is a wasteful number, since it uses less digits than its factorization.

20726028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575733 (or 575728 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20726028 is about 4552.5847603312. The cubic root of 20726028 is about 274.6873714506.

It can be divided in two parts, 2072 and 6028, that added together give a square (8100 = 90²).

The spelling of 20726028 in words is "twenty million, seven hundred twenty-six thousand, twenty-eight".