21127153838640 has 160 divisors (see below), whose sum is σ = 68863296484800. Its totient is φ = 5350460559360.

The previous prime is 21127153838507. The next prime is 21127153838663. The reversal of 21127153838640 is 4683835172112.

21127153838640 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24456675 + ... + 25305794.

It is an arithmetic number, because the mean of its divisors is an integer number (430395603030).

Almost surely, 2^{21127153838640} is an apocalyptic number.

21127153838640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21127153838640 is an abundant number, since it is smaller than the sum of its proper divisors (47736142646160).

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

21127153838640 is a wasteful number, since it uses less digits than its factorization.

21127153838640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49762575 (or 49762569 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 21127153838640 in words is "twenty-one trillion, one hundred twenty-seven billion, one hundred fifty-three million, eight hundred thirty-eight thousand, six hundred forty".