20511264030401 has 4 divisors (see below), whose sum is σ = 20511282829872. Its totient is φ = 20511245230932.

The previous prime is 20511264030379. The next prime is 20511264030479. The reversal of 20511264030401 is 10403046211502.

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 a de Polignac number, because none of the positive numbers 2^k-20511264030401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20511264030701) 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, 7655231 + ... + 9981236.

It is an arithmetic number, because the mean of its divisors is an integer number (5127820707468).

Almost surely, 2^{20511264030401} is an apocalyptic number.

It is an amenable number.

20511264030401 is a deficient number, since it is larger than the sum of its proper divisors (18799471).

20511264030401 is a wasteful number, since it uses less digits than its factorization.

20511264030401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18799470.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 20511264030401 in words is "twenty trillion, five hundred eleven billion, two hundred sixty-four million, thirty thousand, four hundred one".