21442513023513 has 32 divisors (see below), whose sum is σ = 33693873523200. Its totient is φ = 13439260832400.

The previous prime is 21442513023511. The next prime is 21442513023527. The reversal of 21442513023513 is 31532031524412.

21442513023513 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 2 + 5 + 130 + 2 + 3 + 513 = 666.

It is not a de Polignac number, because 21442513023513 - 2¹ = 21442513023511 is a prime.

It is a super-2 number, since 2×21442513023513² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21442513023511) 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, 159468183 + ... + 159602588.

It is an arithmetic number, because the mean of its divisors is an integer number (1052933547600).

Almost surely, 2^{21442513023513} is an apocalyptic number.

It is an amenable number.

21442513023513 is a deficient number, since it is larger than the sum of its proper divisors (12251360499687).

21442513023513 is a wasteful number, since it uses less digits than its factorization.

21442513023513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319070930 (or 319070924 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 21442513023513 its reverse (31532031524412), we get a palindrome (52974544547925).

The spelling of 21442513023513 in words is "twenty-one trillion, four hundred forty-two billion, five hundred thirteen million, twenty-three thousand, five hundred thirteen".