21453034124 has 12 divisors (see below), whose sum is σ = 38158266048. Its totient is φ = 10550672400.

The previous prime is 21453034093. The next prime is 21453034133. The reversal of 21453034124 is 42143035412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43960892 + ... + 43961379.

It is an arithmetic number, because the mean of its divisors is an integer number (3179855504).

Almost surely, 2^21453034124 is an apocalyptic number.

It is an amenable number.

21453034124 is a deficient number, since it is larger than the sum of its proper divisors (16705231924).

21453034124 is a wasteful number, since it uses less digits than its factorization.

21453034124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87922336 (or 87922334 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21453034124 its reverse (42143035412), we get a palindrome (63596069536).

The spelling of 21453034124 in words is "twenty-one billion, four hundred fifty-three million, thirty-four thousand, one hundred twenty-four".