21141602540 has 24 divisors (see below), whose sum is σ = 44716776720. Its totient is φ = 8395800768.

The previous prime is 21141602513. The next prime is 21141602561. The reversal of 21141602540 is 4520614112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3799667 + ... + 3805226.

It is an arithmetic number, because the mean of its divisors is an integer number (1863199030).

Almost surely, 2^21141602540 is an apocalyptic number.

21141602540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21141602540 is an abundant number, since it is smaller than the sum of its proper divisors (23575174180).

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

21141602540 is a wasteful number, since it uses less digits than its factorization.

21141602540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605041 (or 7605039 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 21141602540 in words is "twenty-one billion, one hundred forty-one million, six hundred two thousand, five hundred forty".