21433246523 has 8 divisors (see below), whose sum is σ = 23096598000. Its totient is φ = 19771986528.

The previous prime is 21433246511. The next prime is 21433246537. The reversal of 21433246523 is 32564233412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21433246523 - 2⁶ = 21433246459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433240523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501548 + ... + 542601.

It is an arithmetic number, because the mean of its divisors is an integer number (2887074750).

Almost surely, 2^21433246523 is an apocalyptic number.

21433246523 is a deficient number, since it is larger than the sum of its proper divisors (1663351477).

21433246523 is a wasteful number, since it uses less digits than its factorization.

21433246523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045741.

The product of its digits is 103680, while the sum is 35.

Adding to 21433246523 its reverse (32564233412), we get a palindrome (53997479935).

The spelling of 21433246523 in words is "twenty-one billion, four hundred thirty-three million, two hundred forty-six thousand, five hundred twenty-three".