21204440341 has 16 divisors (see below), whose sum is σ = 24410681856. Its totient is φ = 18042869376.

The previous prime is 21204440339. The next prime is 21204440351. The reversal of 21204440341 is 14304440212.

It is not a de Polignac number, because 21204440341 - 2¹ = 21204440339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204440351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613380 + ... + 647026.

It is an arithmetic number, because the mean of its divisors is an integer number (1525667616).

Almost surely, 2^21204440341 is an apocalyptic number.

It is an amenable number.

21204440341 is a deficient number, since it is larger than the sum of its proper divisors (3206241515).

21204440341 is a wasteful number, since it uses less digits than its factorization.

21204440341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34308.

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

Adding to 21204440341 its reverse (14304440212), we get a palindrome (35508880553).

The spelling of 21204440341 in words is "twenty-one billion, two hundred four million, four hundred forty thousand, three hundred forty-one".