21032332429 has 4 divisors (see below), whose sum is σ = 21600773884. Its totient is φ = 20463890976.

The previous prime is 21032332427. The next prime is 21032332513. The reversal of 21032332429 is 92423323012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13531040329 + 7501292100 = 116323^2 + 86610^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032332429 - 2¹ = 21032332427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21032332429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032332421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284220672 + ... + 284220745.

It is an arithmetic number, because the mean of its divisors is an integer number (5400193471).

Almost surely, 2^21032332429 is an apocalyptic number.

It is an amenable number.

21032332429 is a deficient number, since it is larger than the sum of its proper divisors (568441455).

21032332429 is an equidigital number, since it uses as much as digits as its factorization.

21032332429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568441454.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 21032332429 in words is "twenty-one billion, thirty-two million, three hundred thirty-two thousand, four hundred twenty-nine".