21450305314040 has 16 divisors (see below), whose sum is σ = 48263186956680. Its totient is φ = 8580122125600.

The previous prime is 21450305314021. The next prime is 21450305314069. The reversal of 21450305314040 is 4041350305412.

It is a super-2 number, since 2×21450305314040² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21450305313988 and 21450305314006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268128816386 + ... + 268128816465.

Almost surely, 2^{21450305314040} is an apocalyptic number.

21450305314040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21450305314040 is an abundant number, since it is smaller than the sum of its proper divisors (26812881642640).

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

21450305314040 is a wasteful number, since it uses less digits than its factorization.

21450305314040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536257632862 (or 536257632858 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21450305314040 its reverse (4041350305412), we get a palindrome (25491655619452).

The spelling of 21450305314040 in words is "twenty-one trillion, four hundred fifty billion, three hundred five million, three hundred fourteen thousand, forty".