21115526366404 has 24 divisors (see below), whose sum is σ = 36991226764800. Its totient is φ = 10546609218240.

The previous prime is 21115526366353. The next prime is 21115526366497. The reversal of 21115526366404 is 40466362551112.

It is a super-2 number, since 2×21115526366404² (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, 17126344 + ... + 18317824.

It is an arithmetic number, because the mean of its divisors is an integer number (1541301115200).

Almost surely, 2^{21115526366404} is an apocalyptic number.

It is an amenable number.

21115526366404 is a deficient number, since it is larger than the sum of its proper divisors (15875700398396).

21115526366404 is a wasteful number, since it uses less digits than its factorization.

21115526366404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196163 (or 1196161 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 21115526366404 in words is "twenty-one trillion, one hundred fifteen billion, five hundred twenty-six million, three hundred sixty-six thousand, four hundred four".