21236463212 has 24 divisors (see below), whose sum is σ = 37548551712. Its totient is φ = 10508400000.

The previous prime is 21236463187. The next prime is 21236463217.

21236463212 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21236463217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000712 + ... + 1021712.

It is an arithmetic number, because the mean of its divisors is an integer number (1564522988).

Almost surely, 2^21236463212 is an apocalyptic number.

It is an amenable number.

21236463212 is a deficient number, since it is larger than the sum of its proper divisors (16312088500).

21236463212 is a wasteful number, since it uses less digits than its factorization.

21236463212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23609 (or 23607 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The spelling of 21236463212 in words is "twenty-one billion, two hundred thirty-six million, four hundred sixty-three thousand, two hundred twelve".