21442342032 has 100 divisors (see below), whose sum is σ = 63574183596. Its totient is φ = 6973102080.

The previous prime is 21442342003. The next prime is 21442342037. The reversal of 21442342032 is 23024324412.

21442342032 is a `hidden beast` number, since 214 + 4 + 23 + 420 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9059993856 + 12382348176 = 95184^2 + 111276^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21442341987 and 21442342005.

It is not an unprimeable number, because it can be changed into a prime (21442342037) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 148633 + ... + 254904.

Almost surely, 2^21442342032 is an apocalyptic number.

It is an amenable number.

21442342032 is an abundant number, since it is smaller than the sum of its proper divisors (42131841564).

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

21442342032 is a wasteful number, since it uses less digits than its factorization.

21442342032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403598 (or 403583 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21442342032 its reverse (23024324412), we get a palindrome (44466666444).

The spelling of 21442342032 in words is "twenty-one billion, four hundred forty-two million, three hundred forty-two thousand, thirty-two".