20115636001 has 4 divisors (see below), whose sum is σ = 20115987712. Its totient is φ = 20115284292.

The previous prime is 20115635983. The next prime is 20115636017. The reversal of 20115636001 is 10063651102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10063651102 = 2 ⋅5031825551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20115636001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20115636041) 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, 68025 + ... + 211798.

It is an arithmetic number, because the mean of its divisors is an integer number (5028996928).

Almost surely, 2^20115636001 is an apocalyptic number.

It is an amenable number.

20115636001 is a deficient number, since it is larger than the sum of its proper divisors (351711).

20115636001 is an equidigital number, since it uses as much as digits as its factorization.

20115636001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351710.

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 20115636001 in words is "twenty billion, one hundred fifteen million, six hundred thirty-six thousand, one".