20121324404554 has 8 divisors (see below), whose sum is σ = 30182031541188. Its totient is φ = 10060647224160.

The previous prime is 20121324404543. The next prime is 20121324404557. The reversal of 20121324404554 is 45540442312102.

It can be written as a sum of positive squares in 2 ways, for example, as 19138638801529 + 982685603025 = 4374773^2 + 991305^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20121324404557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5726907 + ... + 8546350.

Almost surely, 2^{20121324404554} is an apocalyptic number.

20121324404554 is a deficient number, since it is larger than the sum of its proper divisors (10060707136634).

20121324404554 is a wasteful number, since it uses less digits than its factorization.

20121324404554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14978120.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 20121324404554 its reverse (45540442312102), we get a palindrome (65661766716656).

The spelling of 20121324404554 in words is "twenty trillion, one hundred twenty-one billion, three hundred twenty-four million, four hundred four thousand, five hundred fifty-four".