20070404 has 12 divisors (see below), whose sum is σ = 37189404. Its totient is φ = 9444864.

The previous prime is 20070397. The next prime is 20070433. The reversal of 20070404 is 40407002.

It can be written as a sum of positive squares in 2 ways, for example, as 15618304 + 4452100 = 3952^2 + 2110^2 .

It is a super-2 number, since 2×20070404² = 805642233446432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147509 + ... + 147644.

It is an arithmetic number, because the mean of its divisors is an integer number (3099117).

Almost surely, 2^20070404 is an apocalyptic number.

It is an amenable number.

20070404 is a deficient number, since it is larger than the sum of its proper divisors (17119000).

20070404 is a wasteful number, since it uses less digits than its factorization.

20070404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295174 (or 295172 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 20070404 is about 4480.0004464285. Note that the first 3 decimals coincide. The cubic root of 20070404 is about 271.7598984125.

Adding to 20070404 its reverse (40407002), we get a palindrome (60477406).

The spelling of 20070404 in words is "twenty million, seventy thousand, four hundred four".