21435533553412 has 48 divisors (see below), whose sum is σ = 44823704728320. Its totient is φ = 8854065113600.

The previous prime is 21435533553403. The next prime is 21435533553433.

21435533553412 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494066764 + ... + 494110147.

It is an arithmetic number, because the mean of its divisors is an integer number (933827181840).

Almost surely, 2^{21435533553412} is an apocalyptic number.

21435533553412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21435533553412 is an abundant number, since it is smaller than the sum of its proper divisors (23388171174908).

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

21435533553412 is a wasteful number, since it uses less digits than its factorization.

21435533553412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988176972 (or 988176970 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 46.

It can be divided in two parts, 2143553 and 3553412, that added together give a palindrome (5696965).

The spelling of 21435533553412 in words is "twenty-one trillion, four hundred thirty-five billion, five hundred thirty-three million, five hundred fifty-three thousand, four hundred twelve".