21024152404 has 12 divisors (see below), whose sum is σ = 36794835700. Its totient is φ = 10511342208.

The previous prime is 21024152381. The next prime is 21024152407. The reversal of 21024152404 is 40425142012.

It can be written as a sum of positive squares in 2 ways, for example, as 19238244804 + 1785907600 = 138702^2 + 42260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024152407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116319 + ... + 235750.

Almost surely, 2^21024152404 is an apocalyptic number.

It is an amenable number.

21024152404 is a deficient number, since it is larger than the sum of its proper divisors (15770683296).

21024152404 is a wasteful number, since it uses less digits than its factorization.

21024152404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367002 (or 367000 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 21024152404 its reverse (40425142012), we get a palindrome (61449294416).

The spelling of 21024152404 in words is "twenty-one billion, twenty-four million, one hundred fifty-two thousand, four hundred four".