20070504 has 80 divisors (see below), whose sum is σ = 57499200. Its totient is φ = 6537888.

The previous prime is 20070473. The next prime is 20070509. The reversal of 20070504 is 40507002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20070509) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30127 + ... + 30785.

It is an arithmetic number, because the mean of its divisors is an integer number (718740).

Almost surely, 2^20070504 is an apocalyptic number.

20070504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20070504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28749600).

20070504 is an abundant number, since it is smaller than the sum of its proper divisors (37428696).

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

20070504 is a wasteful number, since it uses less digits than its factorization.

20070504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20070504 is about 4480.0116071278. The cubic root of 20070504 is about 271.7603497561.

Adding to 20070504 its reverse (40507002), we get a palindrome (60577506).

The spelling of 20070504 in words is "twenty million, seventy thousand, five hundred four".