20355350425 has 6 divisors (see below), whose sum is σ = 25240634558. Its totient is φ = 16284280320.

The previous prime is 20355350413. The next prime is 20355350429. The reversal of 20355350425 is 52405355302.

It can be written as a sum of positive squares in 3 ways, for example, as 1405350144 + 18950000281 = 37488^2 + 137659^2 .

It is not a de Polignac number, because 20355350425 - 2⁹ = 20355349913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20355350429) 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, 407106984 + ... + 407107033.

Almost surely, 2^20355350425 is an apocalyptic number.

20355350425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20355350425 is a deficient number, since it is larger than the sum of its proper divisors (4885284133).

20355350425 is an equidigital number, since it uses as much as digits as its factorization.

20355350425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814214027 (or 814214022 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 34.

The spelling of 20355350425 in words is "twenty billion, three hundred fifty-five million, three hundred fifty thousand, four hundred twenty-five".