20355124420323 has 192 divisors, whose sum is σ = 40708627061760. Its totient is φ = 9803534146560.

The previous prime is 20355124420283. The next prime is 20355124420327. The reversal of 20355124420323 is 32302442155302.

20355124420323 is a `hidden beast` number, since 20 + 3 + 5 + 51 + 244 + 20 + 323 = 666.

It is not a de Polignac number, because 20355124420323 - 2⁸ = 20355124420067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20355124420327) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 25657065 + ... + 26438517.

It is an arithmetic number, because the mean of its divisors is an integer number (212024099280).

Almost surely, 2^{20355124420323} is an apocalyptic number.

20355124420323 is a deficient number, since it is larger than the sum of its proper divisors (20353502641437).

20355124420323 is a wasteful number, since it uses less digits than its factorization.

20355124420323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781575 (or 781558 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 20355124420323 its reverse (32302442155302), we get a palindrome (52657566575625).

The spelling of 20355124420323 in words is "twenty trillion, three hundred fifty-five billion, one hundred twenty-four million, four hundred twenty thousand, three hundred twenty-three".