21140412408 has 48 divisors (see below), whose sum is σ = 57526677000. Its totient is φ = 7013401920.

The previous prime is 21140412401. The next prime is 21140412409. The reversal of 21140412408 is 80421404112.

21140412408 is a `hidden beast` number, since 2 + 11 + 404 + 1 + 240 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140412401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 680583 + ... + 710966.

Almost surely, 2^21140412408 is an apocalyptic number.

It is an amenable number.

21140412408 is an abundant number, since it is smaller than the sum of its proper divisors (36386264592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21140412408 is a wasteful number, since it uses less digits than its factorization.

21140412408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391772 (or 1391765 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The spelling of 21140412408 in words is "twenty-one billion, one hundred forty million, four hundred twelve thousand, four hundred eight".