21152334261004 has 24 divisors (see below), whose sum is σ = 37349251299360. Its totient is φ = 10481537396736.

The previous prime is 21152334260957. The next prime is 21152334261007. The reversal of 21152334261004 is 40016243325112.

It is not an unprimeable number, because it can be changed into a prime (21152334261007) 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, 52021344 + ... + 52426375.

It is an arithmetic number, because the mean of its divisors is an integer number (1556218804140).

Almost surely, 2^{21152334261004} is an apocalyptic number.

It is an amenable number.

21152334261004 is a deficient number, since it is larger than the sum of its proper divisors (16196917038356).

21152334261004 is a wasteful number, since it uses less digits than its factorization.

21152334261004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104448177 (or 104448175 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 21152334261004 its reverse (40016243325112), we get a palindrome (61168577586116).

The spelling of 21152334261004 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred thirty-four million, two hundred sixty-one thousand, four".