21450134310 has 64 divisors (see below), whose sum is σ = 56184952320. Its totient is φ = 5197754880.

The previous prime is 21450134281. The next prime is 21450134311. The reversal of 21450134310 is 1343105412.

It is a happy number.

It is a super-2 number, since 2×21450134310² (a number of 21 digits) contains 22 as substring.

21450134310 is a modest number, since divided by 134310 gives 21450 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450134311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 813006 + ... + 838974.

It is an arithmetic number, because the mean of its divisors is an integer number (877889880).

Almost surely, 2^21450134310 is an apocalyptic number.

21450134310 is an abundant number, since it is smaller than the sum of its proper divisors (34734818010).

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

21450134310 is a wasteful number, since it uses less digits than its factorization.

21450134310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28493.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21450134310 its reverse (1343105412), we get a palindrome (22793239722).

The spelling of 21450134310 in words is "twenty-one billion, four hundred fifty million, one hundred thirty-four thousand, three hundred ten".