21406498818152 has 48 divisors (see below), whose sum is σ = 47017163626080. Its totient is φ = 8950452428160.

The previous prime is 21406498818151. The next prime is 21406498818157. The reversal of 21406498818152 is 25181889460412.

It is a junction number, because it is equal to n+sod(n) for n = 21406498818091 and 21406498818100.

It is not an unprimeable number, because it can be changed into a prime (21406498818151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113605718 + ... + 113793989.

It is an arithmetic number, because the mean of its divisors is an integer number (979524242210).

Almost surely, 2^{21406498818152} is an apocalyptic number.

It is an amenable number.

21406498818152 is an abundant number, since it is smaller than the sum of its proper divisors (25610664807928).

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

21406498818152 is a wasteful number, since it uses less digits than its factorization.

21406498818152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227399802 (or 227399757 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 21406498818152 in words is "twenty-one trillion, four hundred six billion, four hundred ninety-eight million, eight hundred eighteen thousand, one hundred fifty-two".