21454335134350 has 12 divisors (see below), whose sum is σ = 39905063349984. Its totient is φ = 8581734053720.

The previous prime is 21454335134341. The next prime is 21454335134357. The reversal of 21454335134350 is 5343153345412.

It is a junction number, because it is equal to n+sod(n) for n = 21454335134297 and 21454335134306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21454335134357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214543351294 + ... + 214543351393.

It is an arithmetic number, because the mean of its divisors is an integer number (3325421945832).

Almost surely, 2^{21454335134350} is an apocalyptic number.

21454335134350 is a deficient number, since it is larger than the sum of its proper divisors (18450728215634).

21454335134350 is a wasteful number, since it uses less digits than its factorization.

21454335134350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429086702699 (or 429086702694 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 43.

Adding to 21454335134350 its reverse (5343153345412), we get a palindrome (26797488479762).

The spelling of 21454335134350 in words is "twenty-one trillion, four hundred fifty-four billion, three hundred thirty-five million, one hundred thirty-four thousand, three hundred fifty".