21671066357140 has 48 divisors (see below), whose sum is σ = 46113463468800. Its totient is φ = 8553470320512.

The previous prime is 21671066357119. The next prime is 21671066357159. The reversal of 21671066357140 is 4175366017612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1602870 + ... + 6775789.

It is an arithmetic number, because the mean of its divisors is an integer number (960697155600).

Almost surely, 2^{21671066357140} is an apocalyptic number.

21671066357140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21671066357140 is an abundant number, since it is smaller than the sum of its proper divisors (24442397111660).

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

21671066357140 is a wasteful number, since it uses less digits than its factorization.

21671066357140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8380384 (or 8380382 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 21671066357140 in words is "twenty-one trillion, six hundred seventy-one billion, sixty-six million, three hundred fifty-seven thousand, one hundred forty".