21274232404 has 6 divisors (see below), whose sum is σ = 37229906714. Its totient is φ = 10637116200.

The previous prime is 21274232401. The next prime is 21274232411. The reversal of 21274232404 is 40423247212.

It can be written as a sum of positive squares in only one way, i.e., 15065107600 + 6209124804 = 122740^2 + 78798^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274232401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2659279047 + ... + 2659279054.

Almost surely, 2^21274232404 is an apocalyptic number.

It is an amenable number.

21274232404 is a deficient number, since it is larger than the sum of its proper divisors (15955674310).

21274232404 is a wasteful number, since it uses less digits than its factorization.

21274232404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318558105 (or 5318558103 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 31.

Adding to 21274232404 its reverse (40423247212), we get a palindrome (61697479616).

The spelling of 21274232404 in words is "twenty-one billion, two hundred seventy-four million, two hundred thirty-two thousand, four hundred four".