20726090 has 48 divisors (see below), whose sum is σ = 46884096. Its totient is φ = 6457440.

The previous prime is 20726081. The next prime is 20726113. The reversal of 20726090 is 9062702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7247 + ... + 9693.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^20726090 is an apocalyptic number.

20726090 is an abundant number, since it is smaller than the sum of its proper divisors (26158006).

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

20726090 is a wasteful number, since it uses less digits than its factorization.

20726090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483 (or 2472 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20726090 is about 4552.5915696447. The cubic root of 20726090 is about 274.6876453510.

Adding to 20726090 its reverse (9062702), we get a palindrome (29788792).

The spelling of 20726090 in words is "twenty million, seven hundred twenty-six thousand, ninety".