21404313134104 has 32 divisors (see below), whose sum is σ = 40307667756480. Its totient is φ = 10655696265984.

The previous prime is 21404313134101. The next prime is 21404313134123. The reversal of 21404313134104 is 40143131340412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404313134101) 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, 4096347 + ... + 7719370.

It is an arithmetic number, because the mean of its divisors is an integer number (1259614617390).

Almost surely, 2^{21404313134104} is an apocalyptic number.

It is an amenable number.

21404313134104 is a deficient number, since it is larger than the sum of its proper divisors (18903354622376).

21404313134104 is a wasteful number, since it uses less digits than its factorization.

21404313134104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11816707 (or 11816703 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21404313134104 its reverse (40143131340412), we get a palindrome (61547444474516).

The spelling of 21404313134104 in words is "twenty-one trillion, four hundred four billion, three hundred thirteen million, one hundred thirty-four thousand, one hundred four".