21515414332432 has 40 divisors (see below), whose sum is σ = 42537007020800. Its totient is φ = 10540074067200.

The previous prime is 21515414332409. The next prime is 21515414332459. The reversal of 21515414332432 is 23423341451512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60819432 + ... + 61172167.

It is an arithmetic number, because the mean of its divisors is an integer number (1063425175520).

Almost surely, 2^{21515414332432} is an apocalyptic number.

It is an amenable number.

21515414332432 is a deficient number, since it is larger than the sum of its proper divisors (21021592688368).

21515414332432 is a wasteful number, since it uses less digits than its factorization.

21515414332432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121991831 (or 121991825 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

Adding to 21515414332432 its reverse (23423341451512), we get a palindrome (44938755783944).

The spelling of 21515414332432 in words is "twenty-one trillion, five hundred fifteen billion, four hundred fourteen million, three hundred thirty-two thousand, four hundred thirty-two".