21442340401 has 8 divisors (see below), whose sum is σ = 21582094464. Its totient is φ = 21303018000.

The previous prime is 21442340393. The next prime is 21442340411. The reversal of 21442340401 is 10404324412.

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

It is a cyclic number.

It is not a de Polignac number, because 21442340401 - 2³ = 21442340393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442340411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7945 + ... + 207238.

It is an arithmetic number, because the mean of its divisors is an integer number (2697761808).

Almost surely, 2^21442340401 is an apocalyptic number.

It is an amenable number.

21442340401 is a deficient number, since it is larger than the sum of its proper divisors (139754063).

21442340401 is a wasteful number, since it uses less digits than its factorization.

21442340401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215831.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21442340401 its reverse (10404324412), we get a palindrome (31846664813).

The spelling of 21442340401 in words is "twenty-one billion, four hundred forty-two million, three hundred forty thousand, four hundred one".