20434255146 has 12 divisors (see below), whose sum is σ = 44274219522. Its totient is φ = 6811418376.

The previous prime is 20434255141. The next prime is 20434255157. The reversal of 20434255146 is 64155243402.

20434255146 is a `hidden beast` number, since 20 + 4 + 3 + 42 + 551 + 46 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17570828025 + 2863427121 = 132555^2 + 53511^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20434255146.

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 5 ways as a sum of consecutive naturals, for example, 567618181 + ... + 567618216.

Almost surely, 2^20434255146 is an apocalyptic number.

20434255146 is an abundant number, since it is smaller than the sum of its proper divisors (23839964376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20434255146 is a wasteful number, since it uses less digits than its factorization.

20434255146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135236405 (or 1135236402 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 20434255146 its reverse (64155243402), we get a palindrome (84589498548).

The spelling of 20434255146 in words is "twenty billion, four hundred thirty-four million, two hundred fifty-five thousand, one hundred forty-six".