20926560 has 48 divisors (see below), whose sum is σ = 65920176. Its totient is φ = 5580288.

The previous prime is 20926559. The next prime is 20926561. The reversal of 20926560 is 6562902.

It is an interprime number because it is at equal distance from previous prime (20926559) and next prime (20926561).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20926561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21319 + ... + 22278.

It is an arithmetic number, because the mean of its divisors is an integer number (1373337).

Almost surely, 2^20926560 is an apocalyptic number.

20926560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20926560 is an abundant number, since it is smaller than the sum of its proper divisors (44993616).

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

20926560 is a wasteful number, since it uses less digits than its factorization.

20926560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43615 (or 43607 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20926560 is about 4574.5557161324. Note that the first 3 decimals coincide. The cubic root of 20926560 is about 275.5704302681.

The spelling of 20926560 in words is "twenty million, nine hundred twenty-six thousand, five hundred sixty".