21464522212 has 48 divisors (see below), whose sum is σ = 44365531392. Its totient is φ = 8895237120.

The previous prime is 21464522207. The next prime is 21464522293. The reversal of 21464522212 is 21222546412.

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, 46993 + ... + 212455.

It is an arithmetic number, because the mean of its divisors is an integer number (924281904).

Almost surely, 2^21464522212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21464522212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22182765696).

21464522212 is an abundant number, since it is smaller than the sum of its proper divisors (22901009180).

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

21464522212 is a wasteful number, since it uses less digits than its factorization.

21464522212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165628 (or 165626 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The spelling of 21464522212 in words is "twenty-one billion, four hundred sixty-four million, five hundred twenty-two thousand, two hundred twelve".