21154325132 has 24 divisors (see below), whose sum is σ = 37586262336. Its totient is φ = 10415508048.

The previous prime is 21154325099. The next prime is 21154325147. The reversal of 21154325132 is 23152345112.

It is a junction number, because it is equal to n+sod(n) for n = 21154325095 and 21154325104.

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, 813443 + ... + 839045.

It is an arithmetic number, because the mean of its divisors is an integer number (1566094264).

Almost surely, 2^21154325132 is an apocalyptic number.

It is an amenable number.

21154325132 is a deficient number, since it is larger than the sum of its proper divisors (16431937204).

21154325132 is a wasteful number, since it uses less digits than its factorization.

21154325132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28757 (or 28755 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The spelling of 21154325132 in words is "twenty-one billion, one hundred fifty-four million, three hundred twenty-five thousand, one hundred thirty-two".