20633888 has 54 divisors (see below), whose sum is σ = 45271737. Its totient is φ = 9250560.

The previous prime is 20633881. The next prime is 20633911. The reversal of 20633888 is 88833602.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 20539024 + 94864 = 4532^2 + 308^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3212.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20633881) 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 8 ways as a sum of consecutive naturals, for example, 282620 + ... + 282692.

Almost surely, 2^20633888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20633888

20633888 is an abundant number, since it is smaller than the sum of its proper divisors (24637849).

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

20633888 is an equidigital number, since it uses as much as digits as its factorization.

20633888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 20633888 is about 4542.4539623424. The cubic root of 20633888 is about 274.2797150639.

The spelling of 20633888 in words is "twenty million, six hundred thirty-three thousand, eight hundred eighty-eight".