20434255145 has 16 divisors (see below), whose sum is σ = 24609199680. Its totient is φ = 16288780224.

The previous prime is 20434255141. The next prime is 20434255157. The reversal of 20434255145 is 54155243402.

It is a cyclic number.

It is not a de Polignac number, because 20434255145 - 2² = 20434255141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434255141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1705586 + ... + 1717524.

It is an arithmetic number, because the mean of its divisors is an integer number (1538074980).

Almost surely, 2^20434255145 is an apocalyptic number.

It is an amenable number.

20434255145 is a deficient number, since it is larger than the sum of its proper divisors (4174944535).

20434255145 is a wasteful number, since it uses less digits than its factorization.

20434255145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13144.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 20434255145 its reverse (54155243402), we get a palindrome (74589498547).

The spelling of 20434255145 in words is "twenty billion, four hundred thirty-four million, two hundred fifty-five thousand, one hundred forty-five".