20554212115 has 8 divisors (see below), whose sum is σ = 25515573840. Its totient is φ = 15876356832.

The previous prime is 20554212109. The next prime is 20554212137. The reversal of 20554212115 is 51121245502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20554212115 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 70876449 + ... + 70876738.

It is an arithmetic number, because the mean of its divisors is an integer number (3189446730).

Almost surely, 2^20554212115 is an apocalyptic number.

20554212115 is a deficient number, since it is larger than the sum of its proper divisors (4961361725).

20554212115 is a wasteful number, since it uses less digits than its factorization.

20554212115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141753221.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 20554212115 its reverse (51121245502), we get a palindrome (71675457617).

The spelling of 20554212115 in words is "twenty billion, five hundred fifty-four million, two hundred twelve thousand, one hundred fifteen".