20075504 has 40 divisors (see below), whose sum is σ = 42988320. Its totient is φ = 9033728.

The previous prime is 20075501. The next prime is 20075509. The reversal of 20075504 is 40557002.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 20075504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20075501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4652 + ... + 7860.

It is an arithmetic number, because the mean of its divisors is an integer number (1074708).

Almost surely, 2^20075504 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 20075504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21494160).

20075504 is an abundant number, since it is smaller than the sum of its proper divisors (22912816).

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

20075504 is a wasteful number, since it uses less digits than its factorization.

20075504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3251 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20075504 is about 4480.5696066460. The cubic root of 20075504 is about 271.7829150245.

The spelling of 20075504 in words is "twenty million, seventy-five thousand, five hundred four".