21153140404 has 12 divisors (see below), whose sum is σ = 40383268128. Its totient is φ = 9615063800.

The previous prime is 21153140353. The next prime is 21153140419. The reversal of 21153140404 is 40404135112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240376552 + ... + 240376639.

It is an arithmetic number, because the mean of its divisors is an integer number (3365272344).

Almost surely, 2^21153140404 is an apocalyptic number.

It is an amenable number.

21153140404 is a deficient number, since it is larger than the sum of its proper divisors (19230127724).

21153140404 is a wasteful number, since it uses less digits than its factorization.

21153140404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480753206 (or 480753204 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21153140404 its reverse (40404135112), we get a palindrome (61557275516).

The spelling of 21153140404 in words is "twenty-one billion, one hundred fifty-three million, one hundred forty thousand, four hundred four".