21160662406404 has 24 divisors (see below), whose sum is σ = 49376761562688. Its totient is φ = 7053285190560.

The previous prime is 21160662406349. The next prime is 21160662406421. The reversal of 21160662406404 is 40460426606112.

It is a super-2 number, since 2×21160662406404² (a number of 27 digits) contains 22 as substring.

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, 33290152 + ... + 33919839.

It is an arithmetic number, because the mean of its divisors is an integer number (2057365065112).

Almost surely, 2^{21160662406404} is an apocalyptic number.

It is an amenable number.

21160662406404 is an abundant number, since it is smaller than the sum of its proper divisors (28216099156284).

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

21160662406404 is a wasteful number, since it uses less digits than its factorization.

21160662406404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67236235 (or 67236233 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 21160662406404 in words is "twenty-one trillion, one hundred sixty billion, six hundred sixty-two million, four hundred six thousand, four hundred four".