20351214157823 has 8 divisors (see below), whose sum is σ = 20405294807040. Its totient is φ = 20297142555040.

The previous prime is 20351214157801. The next prime is 20351214157829. The reversal of 20351214157823 is 32875141215302.

It is a Cunningham number, because it is equal to 4511232²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20351214157823 - 2⁶ = 20351214157759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351214157829) 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, 2255618 + ... + 6766848.

It is an arithmetic number, because the mean of its divisors is an integer number (2550661850880).

Almost surely, 2^{20351214157823} is an apocalyptic number.

20351214157823 is a deficient number, since it is larger than the sum of its proper divisors (54080649217).

20351214157823 is a wasteful number, since it uses less digits than its factorization.

20351214157823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4523217.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 20351214157823 in words is "twenty trillion, three hundred fifty-one billion, two hundred fourteen million, one hundred fifty-seven thousand, eight hundred twenty-three".