20554411547 has 8 divisors (see below), whose sum is σ = 20781385680. Its totient is φ = 20328135840.

The previous prime is 20554411543. The next prime is 20554411567. The reversal of 20554411547 is 74511445502.

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

It is a cyclic number.

It is not a de Polignac number, because 20554411547 - 2² = 20554411543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20554411547.

It is not an unprimeable number, because it can be changed into a prime (20554411543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115313 + ... + 233250.

It is an arithmetic number, because the mean of its divisors is an integer number (2597673210).

Almost surely, 2^20554411547 is an apocalyptic number.

20554411547 is a deficient number, since it is larger than the sum of its proper divisors (226974133).

20554411547 is a wasteful number, since it uses less digits than its factorization.

20554411547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349213.

The product of its (nonzero) digits is 112000, while the sum is 38.

The spelling of 20554411547 in words is "twenty billion, five hundred fifty-four million, four hundred eleven thousand, five hundred forty-seven".