20406453434463 has 8 divisors (see below), whose sum is σ = 27943972270768. Its totient is φ = 13236618443904.

The previous prime is 20406453434461. The next prime is 20406453434519. The reversal of 20406453434463 is 36443435460402.

It is a happy number.

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

It is not a de Polignac number, because 20406453434463 - 2¹ = 20406453434461 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 (20406453434461) 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, 91920961306 + ... + 91920961527.

It is an arithmetic number, because the mean of its divisors is an integer number (3492996533846).

Almost surely, 2^{20406453434463} is an apocalyptic number.

20406453434463 is a deficient number, since it is larger than the sum of its proper divisors (7537518836305).

20406453434463 is a wasteful number, since it uses less digits than its factorization.

20406453434463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183841922873.

The product of its (nonzero) digits is 9953280, while the sum is 48.

Adding to 20406453434463 its reverse (36443435460402), we get a palindrome (56849888894865).

The spelling of 20406453434463 in words is "twenty trillion, four hundred six billion, four hundred fifty-three million, four hundred thirty-four thousand, four hundred sixty-three".