20355311341021 has 8 divisors (see below), whose sum is σ = 20397361461824. Its totient is φ = 20313262257120.

The previous prime is 20355311341019. The next prime is 20355311341037. The reversal of 20355311341021 is 12014311355302.

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 20355311341021 - 2¹ = 20355311341019 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 (20355311341091) 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, 48492481 + ... + 48910441.

It is an arithmetic number, because the mean of its divisors is an integer number (2549670182728).

Almost surely, 2^{20355311341021} is an apocalyptic number.

It is an amenable number.

20355311341021 is a deficient number, since it is larger than the sum of its proper divisors (42050120803).

20355311341021 is a wasteful number, since it uses less digits than its factorization.

20355311341021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518451.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 20355311341021 its reverse (12014311355302), we get a palindrome (32369622696323).

The spelling of 20355311341021 in words is "twenty trillion, three hundred fifty-five billion, three hundred eleven million, three hundred forty-one thousand, twenty-one".