21234201364 has 12 divisors (see below), whose sum is σ = 37161335988. Its totient is φ = 10616676800.

The previous prime is 21234201349. The next prime is 21234201413. The reversal of 21234201364 is 46310243212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17080398864 + 4153802500 = 130692^2 + 64450^2 .

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, 24624 + ... + 207544.

It is an arithmetic number, because the mean of its divisors is an integer number (3096777999).

Almost surely, 2^21234201364 is an apocalyptic number.

It is an amenable number.

21234201364 is a deficient number, since it is larger than the sum of its proper divisors (15927134624).

21234201364 is a wasteful number, since it uses less digits than its factorization.

21234201364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211946 (or 211944 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21234201364 its reverse (46310243212), we get a palindrome (67544444576).

The spelling of 21234201364 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, three hundred sixty-four".