21468535450 has 48 divisors (see below), whose sum is σ = 41092977024. Its totient is φ = 8340425600.

The previous prime is 21468535447. The next prime is 21468535453. The reversal of 21468535450 is 5453586412.

It is an interprime number because it is at equal distance from previous prime (21468535447) and next prime (21468535453).

It is a junction number, because it is equal to n+sod(n) for n = 21468535397 and 21468535406.

It is not an unprimeable number, because it can be changed into a prime (21468535453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272982 + ... + 342718.

It is an arithmetic number, because the mean of its divisors is an integer number (856103688).

Almost surely, 2^21468535450 is an apocalyptic number.

21468535450 is a deficient number, since it is larger than the sum of its proper divisors (19624441574).

21468535450 is a wasteful number, since it uses less digits than its factorization.

21468535450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69927 (or 69922 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 21468535450 in words is "twenty-one billion, four hundred sixty-eight million, five hundred thirty-five thousand, four hundred fifty".