21436263412 has 48 divisors (see below), whose sum is σ = 38450385792. Its totient is φ = 10454330880.

The previous prime is 21436263371. The next prime is 21436263493.

21436263412 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12440383 + ... + 12442105.

It is an arithmetic number, because the mean of its divisors is an integer number (801049704).

Almost surely, 2^21436263412 is an apocalyptic number.

It is an amenable number.

21436263412 is a deficient number, since it is larger than the sum of its proper divisors (17014122380).

21436263412 is a wasteful number, since it uses less digits than its factorization.

21436263412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248 (or 2246 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The spelling of 21436263412 in words is "twenty-one billion, four hundred thirty-six million, two hundred sixty-three thousand, four hundred twelve".