20450221602411 has 4 divisors (see below), whose sum is σ = 27266962136552. Its totient is φ = 13633481068272.

The previous prime is 20450221602379. The next prime is 20450221602469. The reversal of 20450221602411 is 11420612205402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20450221602411 - 2⁵ = 20450221602379 is a prime.

It is a super-2 number, since 2×20450221602411² (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 (20450221602911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3408370267066 + ... + 3408370267071.

It is an arithmetic number, because the mean of its divisors is an integer number (6816740534138).

Almost surely, 2^{20450221602411} is an apocalyptic number.

20450221602411 is a deficient number, since it is larger than the sum of its proper divisors (6816740534141).

20450221602411 is an equidigital number, since it uses as much as digits as its factorization.

20450221602411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816740534140.

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 20450221602411 its reverse (11420612205402), we get a palindrome (31870833807813).

The spelling of 20450221602411 in words is "twenty trillion, four hundred fifty billion, two hundred twenty-one million, six hundred two thousand, four hundred eleven".