20534333425 has 6 divisors (see below), whose sum is σ = 25462573478. Its totient is φ = 16427466720.

The previous prime is 20534333411. The next prime is 20534333453. The reversal of 20534333425 is 52433343502.

It can be written as a sum of positive squares in 3 ways, for example, as 3692263696 + 16842069729 = 60764^2 + 129777^2 .

It is not a de Polignac number, because 20534333425 - 2⁹ = 20534332913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 410686644 + ... + 410686693.

Almost surely, 2^20534333425 is an apocalyptic number.

20534333425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20534333425 is a deficient number, since it is larger than the sum of its proper divisors (4928240053).

20534333425 is an equidigital number, since it uses as much as digits as its factorization.

20534333425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821373347 (or 821373342 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 34.

Adding to 20534333425 its reverse (52433343502), we get a palindrome (72967676927).

The spelling of 20534333425 in words is "twenty billion, five hundred thirty-four million, three hundred thirty-three thousand, four hundred twenty-five".