21582345629 has 8 divisors (see below), whose sum is σ = 23569886592. Its totient is φ = 19641570480.

The previous prime is 21582345623. The next prime is 21582345641. The reversal of 21582345629 is 92654328512.

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 21582345629 - 2¹² = 21582341533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21582345623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11690489 + ... + 11692334.

It is an arithmetic number, because the mean of its divisors is an integer number (2946235824).

Almost surely, 2^21582345629 is an apocalyptic number.

It is an amenable number.

21582345629 is a deficient number, since it is larger than the sum of its proper divisors (1987540963).

21582345629 is a wasteful number, since it uses less digits than its factorization.

21582345629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23382907.

The product of its digits is 1036800, while the sum is 47.

The spelling of 21582345629 in words is "twenty-one billion, five hundred eighty-two million, three hundred forty-five thousand, six hundred twenty-nine".