21352236412 has 12 divisors (see below), whose sum is σ = 40240753336. Its totient is φ = 9854878320.

The previous prime is 21352236383. The next prime is 21352236469. The reversal of 21352236412 is 21463225312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205309914 + ... + 205310017.

Almost surely, 2^21352236412 is an apocalyptic number.

It is an amenable number.

21352236412 is a deficient number, since it is larger than the sum of its proper divisors (18888516924).

21352236412 is a wasteful number, since it uses less digits than its factorization.

21352236412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410619948 (or 410619946 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The spelling of 21352236412 in words is "twenty-one billion, three hundred fifty-two million, two hundred thirty-six thousand, four hundred twelve".