21450204323401 has 8 divisors (see below), whose sum is σ = 24514677998784. Its totient is φ = 18385770341040.

The previous prime is 21450204323399. The next prime is 21450204323441. The reversal of 21450204323401 is 10432340205412.

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 21450204323401 - 2¹ = 21450204323399 is a prime.

It is a super-2 number, since 2×21450204323401² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21450204323441) 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, 8756095 + ... + 10934788.

It is an arithmetic number, because the mean of its divisors is an integer number (3064334749848).

Almost surely, 2^{21450204323401} is an apocalyptic number.

It is an amenable number.

21450204323401 is a deficient number, since it is larger than the sum of its proper divisors (3064473675383).

21450204323401 is a wasteful number, since it uses less digits than its factorization.

21450204323401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19846511.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 21450204323401 its reverse (10432340205412), we get a palindrome (31882544528813).

The spelling of 21450204323401 in words is "twenty-one trillion, four hundred fifty billion, two hundred four million, three hundred twenty-three thousand, four hundred one".