21542488424513 has 8 divisors (see below), whose sum is σ = 24807925602240. Its totient is φ = 18324035954640.

The previous prime is 21542488424489. The next prime is 21542488424537. The reversal of 21542488424513 is 31542488424512.

It is an interprime number because it is at equal distance from previous prime (21542488424489) and next prime (21542488424537).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21542488424513 - 2²⁴ = 21542471647297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21542488424213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11746175978 + ... + 11746177811.

It is an arithmetic number, because the mean of its divisors is an integer number (3100990700280).

Almost surely, 2^{21542488424513} is an apocalyptic number.

It is an amenable number.

21542488424513 is a deficient number, since it is larger than the sum of its proper divisors (3265437177727).

21542488424513 is a wasteful number, since it uses less digits than its factorization.

21542488424513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23492353927.

The product of its digits is 9830400, while the sum is 53.

Subtracting 21542488424513 from its reverse (31542488424512), we obtain a palindrome (9999999999999).

The spelling of 21542488424513 in words is "twenty-one trillion, five hundred forty-two billion, four hundred eighty-eight million, four hundred twenty-four thousand, five hundred thirteen".