20543603023361 has 8 divisors (see below), whose sum is σ = 22411236868704. Its totient is φ = 18675974773120.

The previous prime is 20543603023357. The next prime is 20543603023369. The reversal of 20543603023361 is 16332030634502.

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 20543603023361 - 2² = 20543603023357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20543603023369) 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, 11257130 + ... + 12954156.

It is an arithmetic number, because the mean of its divisors is an integer number (2801404608588).

Almost surely, 2^{20543603023361} is an apocalyptic number.

It is an amenable number.

20543603023361 is a deficient number, since it is larger than the sum of its proper divisors (1867633845343).

20543603023361 is a wasteful number, since it uses less digits than its factorization.

20543603023361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797551.

The product of its (nonzero) digits is 233280, while the sum is 38.

Adding to 20543603023361 its reverse (16332030634502), we get a palindrome (36875633657863).

The spelling of 20543603023361 in words is "twenty trillion, five hundred forty-three billion, six hundred three million, twenty-three thousand, three hundred sixty-one".