21325303554 has 16 divisors (see below), whose sum is σ = 43455336192. Its totient is φ = 6974313008.

The previous prime is 21325303541. The next prime is 21325303673. The reversal of 21325303554 is 45530352312.

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, 33530034 + ... + 33530669.

It is an arithmetic number, because the mean of its divisors is an integer number (2715958512).

Almost surely, 2^21325303554 is an apocalyptic number.

21325303554 is an abundant number, since it is smaller than the sum of its proper divisors (22130032638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21325303554 is a wasteful number, since it uses less digits than its factorization.

21325303554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67060761.

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 21325303554 its reverse (45530352312), we get a palindrome (66855655866).

The spelling of 21325303554 in words is "twenty-one billion, three hundred twenty-five million, three hundred three thousand, five hundred fifty-four".