20340901443881 has 4 divisors (see below), whose sum is σ = 20349553467264. Its totient is φ = 20332249420500.

The previous prime is 20340901443833. The next prime is 20340901443887. The reversal of 20340901443881 is 18834410904302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20340901443881 - 2¹⁰ = 20340901442857 is a prime.

It is a super-3 number, since 3×20340901443881³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20340901443887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4326008165 + ... + 4326012866.

It is an arithmetic number, because the mean of its divisors is an integer number (5087388366816).

Almost surely, 2^{20340901443881} is an apocalyptic number.

It is an amenable number.

20340901443881 is a deficient number, since it is larger than the sum of its proper divisors (8652023383).

20340901443881 is an equidigital number, since it uses as much as digits as its factorization.

20340901443881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652023382.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 20340901443881 in words is "twenty trillion, three hundred forty billion, nine hundred one million, four hundred forty-three thousand, eight hundred eighty-one".