20581365001 has 4 divisors (see below), whose sum is σ = 21019266432. Its totient is φ = 20143463572.

The previous prime is 20581364983. The next prime is 20581365017. The reversal of 20581365001 is 10056318502.

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 20581365001 - 2¹⁷ = 20581233929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20561365001) 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, 218950645 + ... + 218950738.

It is an arithmetic number, because the mean of its divisors is an integer number (5254816608).

Almost surely, 2^20581365001 is an apocalyptic number.

It is an amenable number.

20581365001 is a deficient number, since it is larger than the sum of its proper divisors (437901431).

20581365001 is an equidigital number, since it uses as much as digits as its factorization.

20581365001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437901430.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 20581365001 in words is "twenty billion, five hundred eighty-one million, three hundred sixty-five thousand, one".