20440402 has 8 divisors (see below), whose sum is σ = 30696012. Its totient is φ = 10208400.

The previous prime is 20440397. The next prime is 20440421. The reversal of 20440402 is 20404402.

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 961 = 4521^2 + 31^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3549 + ... + 7312.

Almost surely, 2^20440402 is an apocalyptic number.

20440402 is a deficient number, since it is larger than the sum of its proper divisors (10255610).

20440402 is a wasteful number, since it uses less digits than its factorization.

20440402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11804.

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

The square root of 20440402 is about 4521.1062805468. The cubic root of 20440402 is about 273.4197053367.

Adding to 20440402 its reverse (20404402), we get a palindrome (40844804).

The spelling of 20440402 in words is "twenty million, four hundred forty thousand, four hundred two".