20388088 has 16 divisors (see below), whose sum is σ = 43688880. Its totient is φ = 8737728.

The previous prime is 20388079. The next prime is 20388107. The reversal of 20388088 is 88088302.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 181981 + ... + 182092.

It is an arithmetic number, because the mean of its divisors is an integer number (2730555).

Almost surely, 2^20388088 is an apocalyptic number.

20388088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20388088 is an abundant number, since it is smaller than the sum of its proper divisors (23300792).

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

20388088 is a wasteful number, since it uses less digits than its factorization.

20388088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364086 (or 364082 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 20388088 is about 4515.3170431322. The cubic root of 20388088 is about 273.1862477866.

The spelling of 20388088 in words is "twenty million, three hundred eighty-eight thousand, eighty-eight".