21404150024 has 16 divisors (see below), whose sum is σ = 40135873020. Its totient is φ = 10701250560.

The previous prime is 21404149993. The next prime is 21404150051. The reversal of 21404150024 is 42005140412.

It can be written as a sum of positive squares in 2 ways, for example, as 19661087524 + 1743062500 = 140218^2 + 41750^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15272 + ... + 207464.

Almost surely, 2^21404150024 is an apocalyptic number.

It is an amenable number.

21404150024 is a deficient number, since it is larger than the sum of its proper divisors (18731722996).

21404150024 is a wasteful number, since it uses less digits than its factorization.

21404150024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206120 (or 206116 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 21404150024 its reverse (42005140412), we get a palindrome (63409290436).

The spelling of 21404150024 in words is "twenty-one billion, four hundred four million, one hundred fifty thousand, twenty-four".