20204540145 has 24 divisors (see below), whose sum is σ = 35414706600. Its totient is φ = 10654676736.

The previous prime is 20204540143. The next prime is 20204540173. The reversal of 20204540145 is 54104540202.

20204540145 is a `hidden beast` number, since 202 + 0 + 454 + 0 + 1 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1532957409 + 18671582736 = 39153^2 + 136644^2 .

It is not a de Polignac number, because 20204540145 - 2¹ = 20204540143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20204540143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2518410 + ... + 2526419.

It is an arithmetic number, because the mean of its divisors is an integer number (1475612775).

Almost surely, 2^20204540145 is an apocalyptic number.

It is an amenable number.

20204540145 is a deficient number, since it is larger than the sum of its proper divisors (15210166455).

20204540145 is a wasteful number, since it uses less digits than its factorization.

20204540145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044929 (or 5044926 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The spelling of 20204540145 in words is "twenty billion, two hundred four million, five hundred forty thousand, one hundred forty-five".