16421212460 has 24 divisors (see below), whose sum is σ = 36299523120. Its totient is φ = 6222775104.

The previous prime is 16421212459. The next prime is 16421212469. The reversal of 16421212460 is 6421212461.

It is not an unprimeable number, because it can be changed into a prime (16421212469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21606479 + ... + 21607238.

It is an arithmetic number, because the mean of its divisors is an integer number (1512480130).

Almost surely, 2^16421212460 is an apocalyptic number.

16421212460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16421212460 is an abundant number, since it is smaller than the sum of its proper divisors (19878310660).

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

16421212460 is a wasteful number, since it uses less digits than its factorization.

16421212460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43213745 (or 43213743 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

Subtracting from 16421212460 its reverse (6421212461), we obtain a palindrome (9999999999).

The spelling of 16421212460 in words is "sixteen billion, four hundred twenty-one million, two hundred twelve thousand, four hundred sixty".