21054510322 has 8 divisors (see below), whose sum is σ = 32352052572. Its totient is φ = 10270492800.

The previous prime is 21054510289. The next prime is 21054510349. The reversal of 21054510322 is 22301545012.

It can be written as a sum of positive squares in 2 ways, for example, as 12893375401 + 8161134921 = 113549^2 + 90339^2 .

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128381079 + ... + 128381242.

Almost surely, 2^21054510322 is an apocalyptic number.

21054510322 is a deficient number, since it is larger than the sum of its proper divisors (11297542250).

21054510322 is a wasteful number, since it uses less digits than its factorization.

21054510322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256762364.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 21054510322 in words is "twenty-one billion, fifty-four million, five hundred ten thousand, three hundred twenty-two".