21324203351512 has 32 divisors (see below), whose sum is σ = 40164619860000. Its totient is φ = 10613654615808.

The previous prime is 21324203351509. The next prime is 21324203351557. The reversal of 21324203351512 is 21515330242312.

It is a super-2 number, since 2×21324203351512² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 9298564 + ... + 11362732.

It is an arithmetic number, because the mean of its divisors is an integer number (1255144370625).

Almost surely, 2^{21324203351512} is an apocalyptic number.

It is an amenable number.

21324203351512 is a deficient number, since it is larger than the sum of its proper divisors (18840416508488).

21324203351512 is a wasteful number, since it uses less digits than its factorization.

21324203351512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070043 (or 2070039 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 21324203351512 its reverse (21515330242312), we get a palindrome (42839533593824).

The spelling of 21324203351512 in words is "twenty-one trillion, three hundred twenty-four billion, two hundred three million, three hundred fifty-one thousand, five hundred twelve".