20523912 has 32 divisors (see below), whose sum is σ = 53542080. Its totient is φ = 6543680.

The previous prime is 20523911. The next prime is 20523941. The reversal of 20523912 is 21932502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20523911) 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, 18039 + ... + 19142.

It is an arithmetic number, because the mean of its divisors is an integer number (1673190).

Almost surely, 2^20523912 is an apocalyptic number.

It is an amenable number.

20523912 is an abundant number, since it is smaller than the sum of its proper divisors (33018168).

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

20523912 is a wasteful number, since it uses less digits than its factorization.

20523912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37213 (or 37209 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20523912 is about 4530.3324381330. The cubic root of 20523912 is about 273.7915547518.

The spelling of 20523912 in words is "twenty million, five hundred twenty-three thousand, nine hundred twelve".