21276097442 has 8 divisors (see below), whose sum is σ = 32046570732. Its totient is φ = 10593907200.

The previous prime is 21276097441. The next prime is 21276097477. The reversal of 21276097442 is 24479067212.

It can be written as a sum of positive squares in 2 ways, for example, as 17702568601 + 3573528841 = 133051^2 + 59779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21276097442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21276097393 and 21276097402.

It is not an unprimeable number, because it can be changed into a prime (21276097441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22070159 + ... + 22071122.

Almost surely, 2^21276097442 is an apocalyptic number.

21276097442 is a deficient number, since it is larger than the sum of its proper divisors (10770473290).

21276097442 is a wasteful number, since it uses less digits than its factorization.

21276097442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44141524.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 21276097442 in words is "twenty-one billion, two hundred seventy-six million, ninety-seven thousand, four hundred forty-two".