21513415432004 has 24 divisors (see below), whose sum is σ = 41596271273088. Its totient is φ = 9683788019840.

The previous prime is 21513415431983. The next prime is 21513415432037. The reversal of 21513415432004 is 40023451431512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6877688792 + ... + 6877691919.

It is an arithmetic number, because the mean of its divisors is an integer number (1733177969712).

Almost surely, 2^{21513415432004} is an apocalyptic number.

It is an amenable number.

21513415432004 is a deficient number, since it is larger than the sum of its proper divisors (20082855841084).

21513415432004 is a wasteful number, since it uses less digits than its factorization.

21513415432004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13755380755 (or 13755380753 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21513415432004 its reverse (40023451431512), we get a palindrome (61536866863516).

The spelling of 21513415432004 in words is "twenty-one trillion, five hundred thirteen billion, four hundred fifteen million, four hundred thirty-two thousand, four".