21145514411514 has 32 divisors (see below), whose sum is σ = 42616504820160. Its totient is φ = 6994299341952.

The previous prime is 21145514411513. The next prime is 21145514411531. The reversal of 21145514411514 is 41511441554112.

It is a super-3 number, since 3×21145514411514³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21145514411513) 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, 2978809 + ... + 7152924.

It is an arithmetic number, because the mean of its divisors is an integer number (1331765775630).

Almost surely, 2^{21145514411514} is an apocalyptic number.

21145514411514 is an abundant number, since it is smaller than the sum of its proper divisors (21470990408646).

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

21145514411514 is a wasteful number, since it uses less digits than its factorization.

21145514411514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10134414.

The product of its digits is 64000, while the sum is 39.

Adding to 21145514411514 its reverse (41511441554112), we get a palindrome (62656955965626).

The spelling of 21145514411514 in words is "twenty-one trillion, one hundred forty-five billion, five hundred fourteen million, four hundred eleven thousand, five hundred fourteen".