21453042310540 has 48 divisors (see below), whose sum is σ = 45489990454272. Its totient is φ = 8497678193856.

The previous prime is 21453042310537. The next prime is 21453042310549. The reversal of 21453042310540 is 4501324035412.

It is a junction number, because it is equal to n+sod(n) for n = 21453042310496 and 21453042310505.

It is not an unprimeable number, because it can be changed into a prime (21453042310549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92351217 + ... + 92583223.

It is an arithmetic number, because the mean of its divisors is an integer number (947708134464).

Almost surely, 2^{21453042310540} is an apocalyptic number.

21453042310540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21453042310540 is an abundant number, since it is smaller than the sum of its proper divisors (24036948143732).

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

21453042310540 is a wasteful number, since it uses less digits than its factorization.

21453042310540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277006 (or 277004 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 21453042310540 its reverse (4501324035412), we get a palindrome (25954366345952).

The spelling of 21453042310540 in words is "twenty-one trillion, four hundred fifty-three billion, forty-two million, three hundred ten thousand, five hundred forty".