21434351454 has 48 divisors (see below), whose sum is σ = 47193269760. Its totient is φ = 7029484560.

The previous prime is 21434351437. The next prime is 21434351479. The reversal of 21434351454 is 45415343412.

21434351454 is a `hidden beast` number, since 214 + 3 + 435 + 1 + 4 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 605167 + ... + 639605.

It is an arithmetic number, because the mean of its divisors is an integer number (983193120).

Almost surely, 2^21434351454 is an apocalyptic number.

21434351454 is an abundant number, since it is smaller than the sum of its proper divisors (25758918306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21434351454 is a wasteful number, since it uses less digits than its factorization.

21434351454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35005 (or 35002 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 21434351454 its reverse (45415343412), we get a palindrome (66849694866).

The spelling of 21434351454 in words is "twenty-one billion, four hundred thirty-four million, three hundred fifty-one thousand, four hundred fifty-four".