20346501321421 has 8 divisors (see below), whose sum is σ = 22196362341888. Its totient is φ = 18496670148000.

The previous prime is 20346501321409. The next prime is 20346501321469. The reversal of 20346501321421 is 12412310564302.

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

It is not a de Polignac number, because 20346501321421 - 2¹¹ = 20346501319373 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 (20346501321401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6024360 + ... + 8774161.

It is an arithmetic number, because the mean of its divisors is an integer number (2774545292736).

Almost surely, 2^{20346501321421} is an apocalyptic number.

It is an amenable number.

20346501321421 is a deficient number, since it is larger than the sum of its proper divisors (1849861020467).

20346501321421 is a wasteful number, since it uses less digits than its factorization.

20346501321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14923523.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20346501321421 its reverse (12412310564302), we get a palindrome (32758811885723).

The spelling of 20346501321421 in words is "twenty trillion, three hundred forty-six billion, five hundred one million, three hundred twenty-one thousand, four hundred twenty-one".