20354211253357 has 8 divisors (see below), whose sum is σ = 20503379768256. Its totient is φ = 20205051400032.

The previous prime is 20354211253331. The next prime is 20354211253361. The reversal of 20354211253357 is 75335211245302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20354211253357 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 (20354211253307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2589838 + ... + 6885904.

It is an arithmetic number, because the mean of its divisors is an integer number (2562922471032).

Almost surely, 2^{20354211253357} is an apocalyptic number.

It is an amenable number.

20354211253357 is a deficient number, since it is larger than the sum of its proper divisors (149168514899).

20354211253357 is a wasteful number, since it uses less digits than its factorization.

20354211253357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330787.

The product of its (nonzero) digits is 756000, while the sum is 43.

Adding to 20354211253357 its reverse (75335211245302), we get a palindrome (95689422498659).

The spelling of 20354211253357 in words is "twenty trillion, three hundred fifty-four billion, two hundred eleven million, two hundred fifty-three thousand, three hundred fifty-seven".