21146442632 has 32 divisors (see below), whose sum is σ = 45418993920. Its totient is φ = 9041723520.

The previous prime is 21146442623. The next prime is 21146442637. The reversal of 21146442632 is 23624464112.

It is a junction number, because it is equal to n+sod(n) for n = 21146442592 and 21146442601.

It is not an unprimeable number, because it can be changed into a prime (21146442637) 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, 413933 + ... + 462204.

It is an arithmetic number, because the mean of its divisors is an integer number (1419343560).

Almost surely, 2^21146442632 is an apocalyptic number.

It is an amenable number.

21146442632 is an abundant number, since it is smaller than the sum of its proper divisors (24272551288).

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

21146442632 is a wasteful number, since it uses less digits than its factorization.

21146442632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876581 (or 876577 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The spelling of 21146442632 in words is "twenty-one billion, one hundred forty-six million, four hundred forty-two thousand, six hundred thirty-two".