21550104324 has 96 divisors (see below), whose sum is σ = 65577980160. Its totient is φ = 5990754816.

The previous prime is 21550104319. The next prime is 21550104337. The reversal of 21550104324 is 42340105512.

21550104324 is a `hidden beast` number, since 2 + 1 + 550 + 104 + 3 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357237 + ... + 413180.

It is an arithmetic number, because the mean of its divisors is an integer number (683103960).

Almost surely, 2^21550104324 is an apocalyptic number.

It is an amenable number.

21550104324 is an abundant number, since it is smaller than the sum of its proper divisors (44027875836).

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

21550104324 is a wasteful number, since it uses less digits than its factorization.

21550104324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770474 (or 770466 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21550104324 its reverse (42340105512), we get a palindrome (63890209836).

The spelling of 21550104324 in words is "twenty-one billion, five hundred fifty million, one hundred four thousand, three hundred twenty-four".