20355253400356 has 24 divisors (see below), whose sum is σ = 40710836597760. Its totient is φ = 8723609357952.

The previous prime is 20355253400351. The next prime is 20355253400393. The reversal of 20355253400356 is 65300435255302.

It is not an unprimeable number, because it can be changed into a prime (20355253400351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650460 + ... + 6413548.

It is an arithmetic number, because the mean of its divisors is an integer number (1696284858240).

Almost surely, 2^{20355253400356} is an apocalyptic number.

It is an amenable number.

20355253400356 is an abundant number, since it is smaller than the sum of its proper divisors (20355583197404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20355253400356 is a wasteful number, since it uses less digits than its factorization.

20355253400356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889243 (or 5889241 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 43.

Adding to 20355253400356 its reverse (65300435255302), we get a palindrome (85655688655658).

The spelling of 20355253400356 in words is "twenty trillion, three hundred fifty-five billion, two hundred fifty-three million, four hundred thousand, three hundred fifty-six".