20434155125 has 32 divisors (see below), whose sum is σ = 27079419744. Its totient is φ = 15341568000.

The previous prime is 20434155113. The next prime is 20434155241. The reversal of 20434155125 is 52155143402.

It can be written as a sum of positive squares in 16 ways, for example, as 5208075889 + 15226079236 = 72167^2 + 123394^2 .

It is not a de Polignac number, because 20434155125 - 2¹⁸ = 20433892981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20434155091 and 20434155100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 736505 + ... + 763745.

It is an arithmetic number, because the mean of its divisors is an integer number (846231867).

Almost surely, 2^20434155125 is an apocalyptic number.

20434155125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20434155125 is a deficient number, since it is larger than the sum of its proper divisors (6645264619).

20434155125 is a wasteful number, since it uses less digits than its factorization.

20434155125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27626 (or 27616 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 20434155125 its reverse (52155143402), we get a palindrome (72589298527).

The spelling of 20434155125 in words is "twenty billion, four hundred thirty-four million, one hundred fifty-five thousand, one hundred twenty-five".