20926620 has 192 divisors, whose sum is σ = 76769280. Its totient is φ = 4665600.

The previous prime is 20926597. The next prime is 20926621. The reversal of 20926620 is 2662902.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20926621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77085 + ... + 77355.

It is an arithmetic number, because the mean of its divisors is an integer number (399840).

Almost surely, 2^20926620 is an apocalyptic number.

20926620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20926620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38384640).

20926620 is an abundant number, since it is smaller than the sum of its proper divisors (55842660).

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

20926620 is a wasteful number, since it uses less digits than its factorization.

20926620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20926620 is about 4574.5622741416. The cubic root of 20926620 is about 275.5706936369.

The spelling of 20926620 in words is "twenty million, nine hundred twenty-six thousand, six hundred twenty".