20145434470 has 16 divisors (see below), whose sum is σ = 41442036768. Its totient is φ = 6907006080.

The previous prime is 20145434417. The next prime is 20145434471. The reversal of 20145434470 is 7443454102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145434471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143895891 + ... + 143896030.

It is an arithmetic number, because the mean of its divisors is an integer number (2590127298).

Almost surely, 2^20145434470 is an apocalyptic number.

20145434470 is an abundant number, since it is smaller than the sum of its proper divisors (21296602298).

20145434470 is a wasteful number, since it uses less digits than its factorization.

20145434470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287791935.

The product of its (nonzero) digits is 53760, while the sum is 34.

Adding to 20145434470 its reverse (7443454102), we get a palindrome (27588888572).

The spelling of 20145434470 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, four hundred seventy".