20354461604421 has 8 divisors (see below), whose sum is σ = 31016322444864. Its totient is φ = 11631120916800.

The previous prime is 20354461604419. The next prime is 20354461604441. The reversal of 20354461604421 is 12440616445302.

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

It is not a de Polignac number, because 20354461604421 - 2¹ = 20354461604419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354461604441) 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, 484630038180 + ... + 484630038221.

It is an arithmetic number, because the mean of its divisors is an integer number (3877040305608).

Almost surely, 2^{20354461604421} is an apocalyptic number.

20354461604421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20354461604421 is a deficient number, since it is larger than the sum of its proper divisors (10661860840443).

20354461604421 is an equidigital number, since it uses as much as digits as its factorization.

20354461604421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969260076411.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 20354461604421 in words is "twenty trillion, three hundred fifty-four billion, four hundred sixty-one million, six hundred four thousand, four hundred twenty-one".