20240404 has 18 divisors (see below), whose sum is σ = 37628990. Its totient is φ = 9524352.

The previous prime is 20240399. The next prime is 20240411. The reversal of 20240404 is 40404202.

It can be written as a sum of positive squares in 3 ways, for example, as 2160900 + 18079504 = 1470^2 + 4252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7599 + ... + 9910.

Almost surely, 2^20240404 is an apocalyptic number.

It is an amenable number.

20240404 is a deficient number, since it is larger than the sum of its proper divisors (17388586).

20240404 is a wasteful number, since it uses less digits than its factorization.

20240404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17547 (or 17528 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20240404 is about 4498.9336514334. The cubic root of 20240404 is about 272.5250275809.

Adding to 20240404 its reverse (40404202), we get a palindrome (60644606).

The spelling of 20240404 in words is "twenty million, two hundred forty thousand, four hundred four".