20143604 has 24 divisors (see below), whose sum is σ = 38684520. Its totient is φ = 9120384.

The previous prime is 20143567. The next prime is 20143619. The reversal of 20143604 is 40634102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1567504 + 18576100 = 1252^2 + 4310^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899 + ... + 6410.

It is an arithmetic number, because the mean of its divisors is an integer number (1611855).

Almost surely, 2^20143604 is an apocalyptic number.

It is an amenable number.

20143604 is a deficient number, since it is larger than the sum of its proper divisors (18540916).

20143604 is a wasteful number, since it uses less digits than its factorization.

20143604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7379 (or 7377 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20143604 is about 4488.1626530241. The cubic root of 20143604 is about 272.0898816278.

Adding to 20143604 its reverse (40634102), we get a palindrome (60777706).

The spelling of 20143604 in words is "twenty million, one hundred forty-three thousand, six hundred four".