21629142852 has 24 divisors (see below), whose sum is σ = 50568348096. Its totient is φ = 7195378848.

The previous prime is 21629142833. The next prime is 21629142859. The reversal of 21629142852 is 25824192612.

It is not an unprimeable number, because it can be changed into a prime (21629142859) 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 7 ways as a sum of consecutive naturals, for example, 1785643 + ... + 1797714.

It is an arithmetic number, because the mean of its divisors is an integer number (2107014504).

Almost surely, 2^21629142852 is an apocalyptic number.

It is an amenable number.

21629142852 is an abundant number, since it is smaller than the sum of its proper divisors (28939205244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21629142852 is a wasteful number, since it uses less digits than its factorization.

21629142852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583867 (or 3583865 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The spelling of 21629142852 in words is "twenty-one billion, six hundred twenty-nine million, one hundred forty-two thousand, eight hundred fifty-two".