21142404413 has 8 divisors (see below), whose sum is σ = 23967098400. Its totient is φ = 18488904048.

The previous prime is 21142404403. The next prime is 21142404421. The reversal of 21142404413 is 31440424112.

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 21142404413 - 2⁴ = 21142404397 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 (21142404403) 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, 42798143 + ... + 42798636.

It is an arithmetic number, because the mean of its divisors is an integer number (2995887300).

Almost surely, 2^21142404413 is an apocalyptic number.

It is an amenable number.

21142404413 is a deficient number, since it is larger than the sum of its proper divisors (2824693987).

21142404413 is a wasteful number, since it uses less digits than its factorization.

21142404413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85596811.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21142404413 its reverse (31440424112), we get a palindrome (52582828525).

The spelling of 21142404413 in words is "twenty-one billion, one hundred forty-two million, four hundred four thousand, four hundred thirteen".