21570389529 has 48 divisors (see below), whose sum is σ = 32552731008. Its totient is φ = 12675227136.

The previous prime is 21570389461. The next prime is 21570389543. The reversal of 21570389529 is 92598307512.

It is not a de Polignac number, because 21570389529 - 2⁸ = 21570389273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21570389569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9012757 + ... + 9015149.

It is an arithmetic number, because the mean of its divisors is an integer number (678181896).

Almost surely, 2^21570389529 is an apocalyptic number.

It is an amenable number.

21570389529 is a deficient number, since it is larger than the sum of its proper divisors (10982341479).

21570389529 is a wasteful number, since it uses less digits than its factorization.

21570389529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 3205 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 21570389529 in words is "twenty-one billion, five hundred seventy million, three hundred eighty-nine thousand, five hundred twenty-nine".