20681088 has 32 divisors (see below), whose sum is σ = 54935160. Its totient is φ = 6893568.

The previous prime is 20681083. The next prime is 20681107. The reversal of 20681088 is 88018602.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20681083) 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, 26545 + ... + 27312.

Almost surely, 2^20681088 is an apocalyptic number.

It is an amenable number.

20681088 is an abundant number, since it is smaller than the sum of its proper divisors (34254072).

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

20681088 is an equidigital number, since it uses as much as digits as its factorization.

20681088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53874 (or 53862 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 20681088 is about 4547.6464242507. The cubic root of 20681088 is about 274.4886939979.

The spelling of 20681088 in words is "twenty million, six hundred eighty-one thousand, eighty-eight".