21878310554 has 8 divisors (see below), whose sum is σ = 32818374720. Its totient is φ = 10938852316.

The previous prime is 21878310533. The next prime is 21878310613. The reversal of 21878310554 is 45501387812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46724 + ... + 214335.

It is an arithmetic number, because the mean of its divisors is an integer number (4102296840).

Almost surely, 2^21878310554 is an apocalyptic number.

21878310554 is a deficient number, since it is larger than the sum of its proper divisors (10940064166).

21878310554 is a wasteful number, since it uses less digits than its factorization.

21878310554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302964.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 21878310554 in words is "twenty-one billion, eight hundred seventy-eight million, three hundred ten thousand, five hundred fifty-four".