20034512145 has 24 divisors (see below), whose sum is σ = 34742725992. Its totient is φ = 10680076800.

The previous prime is 20034512143. The next prime is 20034512153. The reversal of 20034512145 is 54121543002.

20034512145 is a `hidden beast` number, since 2 + 0 + 0 + 3 + 4 + 512 + 145 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 156050064 + 19878462081 = 12492^2 + 140991^2 .

It is not a de Polignac number, because 20034512145 - 2¹ = 20034512143 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20034512143) 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, 5766 + ... + 200255.

It is an arithmetic number, because the mean of its divisors is an integer number (1447613583).

Almost surely, 2^20034512145 is an apocalyptic number.

It is an amenable number.

20034512145 is a deficient number, since it is larger than the sum of its proper divisors (14708213847).

20034512145 is a wasteful number, since it uses less digits than its factorization.

20034512145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208193 (or 208190 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 20034512145 in words is "twenty billion, thirty-four million, five hundred twelve thousand, one hundred forty-five".