21554050332 has 24 divisors (see below), whose sum is σ = 50484018816. Its totient is φ = 7157364208.

The previous prime is 21554050313. The next prime is 21554050351. The reversal of 21554050332 is 23305045512.

It is an interprime number because it is at equal distance from previous prime (21554050313) and next prime (21554050351).

It is a self number, because there is not a number n which added to its sum of digits gives 21554050332.

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, 3411618 + ... + 3417929.

It is an arithmetic number, because the mean of its divisors is an integer number (2103500784).

Almost surely, 2^21554050332 is an apocalyptic number.

It is an amenable number.

21554050332 is an abundant number, since it is smaller than the sum of its proper divisors (28929968484).

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

21554050332 is a wasteful number, since it uses less digits than its factorization.

21554050332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829817 (or 6829815 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 21554050332 its reverse (23305045512), we get a palindrome (44859095844).

The spelling of 21554050332 in words is "twenty-one billion, five hundred fifty-four million, fifty thousand, three hundred thirty-two".