20123288 has 8 divisors (see below), whose sum is σ = 37731180. Its totient is φ = 10061640.

The previous prime is 20123287. The next prime is 20123293. The reversal of 20123288 is 88232102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123287) 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 as a sum of consecutive naturals, namely, 1257698 + ... + 1257713.

Almost surely, 2^20123288 is an apocalyptic number.

It is an amenable number.

20123288 is a deficient number, since it is larger than the sum of its proper divisors (17607892).

20123288 is a wasteful number, since it uses less digits than its factorization.

20123288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515417 (or 2515413 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20123288 is about 4485.8987951134. The cubic root of 20123288 is about 271.9983780180.

The spelling of 20123288 in words is "twenty million, one hundred twenty-three thousand, two hundred eighty-eight".