21232563429 has 24 divisors (see below), whose sum is σ = 35925972768. Its totient is φ = 11029902240.

The previous prime is 21232563421. The next prime is 21232563433. The reversal of 21232563429 is 92436523212.

It is a happy number.

It is not a de Polignac number, because 21232563429 - 2³ = 21232563421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232563421) 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 23 ways as a sum of consecutive naturals, for example, 6563802 + ... + 6567035.

It is an arithmetic number, because the mean of its divisors is an integer number (1496915532).

Almost surely, 2^21232563429 is an apocalyptic number.

It is an amenable number.

21232563429 is a deficient number, since it is larger than the sum of its proper divisors (14693409339).

21232563429 is a wasteful number, since it uses less digits than its factorization.

21232563429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13130865 (or 13130858 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The spelling of 21232563429 in words is "twenty-one billion, two hundred thirty-two million, five hundred sixty-three thousand, four hundred twenty-nine".