20355203311425 has 72 divisors (see below), whose sum is σ = 38487895798560. Its totient is φ = 10255094553600.

The previous prime is 20355203311357. The next prime is 20355203311511. The reversal of 20355203311425 is 52411330255302.

20355203311425 is a `hidden beast` number, since 20 + 3 + 5 + 5 + 203 + 3 + 1 + 1 + 425 = 666.

It is not a de Polignac number, because 20355203311425 - 2⁷ = 20355203311297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20355203311425.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5377456 + ... + 8344305.

Almost surely, 2^{20355203311425} is an apocalyptic number.

20355203311425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20355203311425 is a deficient number, since it is larger than the sum of its proper divisors (18132692487135).

20355203311425 is a wasteful number, since it uses less digits than its factorization.

20355203311425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13722143 (or 13722135 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 20355203311425 its reverse (52411330255302), we get a palindrome (72766533566727).

The spelling of 20355203311425 in words is "twenty trillion, three hundred fifty-five billion, two hundred three million, three hundred eleven thousand, four hundred twenty-five".