21580206860377 has 8 divisors (see below), whose sum is σ = 23927978993472. Its totient is φ = 19296757251600.

The previous prime is 21580206860327. The next prime is 21580206860419. The reversal of 21580206860377 is 77306860208512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21580206860377 - 2⁷ = 21580206860249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21580206860327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16080630373 + ... + 16080631714.

It is an arithmetic number, because the mean of its divisors is an integer number (2990997374184).

Almost surely, 2^{21580206860377} is an apocalyptic number.

It is an amenable number.

21580206860377 is a deficient number, since it is larger than the sum of its proper divisors (2347772133095).

21580206860377 is a wasteful number, since it uses less digits than its factorization.

21580206860377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32161262159.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 21580206860377 in words is "twenty-one trillion, five hundred eighty billion, two hundred six million, eight hundred sixty thousand, three hundred seventy-seven".