21146341801 has 8 divisors (see below), whose sum is σ = 23146311944. Its totient is φ = 19199704320.

The previous prime is 21146341789. The next prime is 21146341819. The reversal of 21146341801 is 10814364112.

It can be written as a sum of positive squares in 4 ways, for example, as 560979225 + 20585362576 = 23685^2 + 143476^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21146341801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21146341301) 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, 13332336 + ... + 13333921.

It is an arithmetic number, because the mean of its divisors is an integer number (2893288993).

Almost surely, 2^21146341801 is an apocalyptic number.

It is an amenable number.

21146341801 is a deficient number, since it is larger than the sum of its proper divisors (1999970143).

21146341801 is a wasteful number, since it uses less digits than its factorization.

21146341801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26666331.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 21146341801 in words is "twenty-one billion, one hundred forty-six million, three hundred forty-one thousand, eight hundred one".