21446541442 has 4 divisors (see below), whose sum is σ = 32169812166. Its totient is φ = 10723270720.

The previous prime is 21446541421. The next prime is 21446541443. The reversal of 21446541442 is 24414564412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18683882721 + 2762658721 = 136689^2 + 52561^2 .

It is not an unprimeable number, because it can be changed into a prime (21446541443) 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 as a sum of consecutive naturals, namely, 5361635359 + ... + 5361635362.

Almost surely, 2^21446541442 is an apocalyptic number.

21446541442 is a deficient number, since it is larger than the sum of its proper divisors (10723270724).

21446541442 is a wasteful number, since it uses less digits than its factorization.

21446541442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10723270723.

The product of its digits is 122880, while the sum is 37.

The spelling of 21446541442 in words is "twenty-one billion, four hundred forty-six million, five hundred forty-one thousand, four hundred forty-two".