20554523420145 has 64 divisors (see below), whose sum is σ = 39458813313024. Its totient is φ = 9003498981120.

The previous prime is 20554523420143. The next prime is 20554523420213. The reversal of 20554523420145 is 54102432545502.

It is not a de Polignac number, because 20554523420145 - 2¹ = 20554523420143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20554523420097 and 20554523420106.

It is not an unprimeable number, because it can be changed into a prime (20554523420143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101840977 + ... + 102042606.

It is an arithmetic number, because the mean of its divisors is an integer number (616543958016).

Almost surely, 2^{20554523420145} is an apocalyptic number.

It is an amenable number.

20554523420145 is a deficient number, since it is larger than the sum of its proper divisors (18904289892879).

20554523420145 is a wasteful number, since it uses less digits than its factorization.

20554523420145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203883662.

The product of its (nonzero) digits is 960000, while the sum is 42.

Adding to 20554523420145 its reverse (54102432545502), we get a palindrome (74656955965647).

The spelling of 20554523420145 in words is "twenty trillion, five hundred fifty-four billion, five hundred twenty-three million, four hundred twenty thousand, one hundred forty-five".