20402434454463 has 48 divisors (see below), whose sum is σ = 30239848454400. Its totient is φ = 13251126430080.

The previous prime is 20402434454459. The next prime is 20402434454473. The reversal of 20402434454463 is 36445443420402.

20402434454463 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 2 + 4 + 3 + 44 + 544 + 63 = 666.

It is not a de Polignac number, because 20402434454463 - 2² = 20402434454459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402434454473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91963356 + ... + 92184942.

It is an arithmetic number, because the mean of its divisors is an integer number (629996842800).

Almost surely, 2^{20402434454463} is an apocalyptic number.

20402434454463 is a deficient number, since it is larger than the sum of its proper divisors (9837413999937).

20402434454463 is a wasteful number, since it uses less digits than its factorization.

20402434454463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223372 (or 223369 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 45.

Adding to 20402434454463 its reverse (36445443420402), we get a palindrome (56847877874865).

The spelling of 20402434454463 in words is "twenty trillion, four hundred two billion, four hundred thirty-four million, four hundred fifty-four thousand, four hundred sixty-three".