20001523201 has 4 divisors (see below), whose sum is σ = 21819843504. Its totient is φ = 18183202900.

The previous prime is 20001523177. The next prime is 20001523219. The reversal of 20001523201 is 10232510002.

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 20001523201 - 2⁵ = 20001523169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001523291) 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, 909160135 + ... + 909160156.

It is an arithmetic number, because the mean of its divisors is an integer number (5454960876).

Almost surely, 2^20001523201 is an apocalyptic number.

It is an amenable number.

20001523201 is a deficient number, since it is larger than the sum of its proper divisors (1818320303).

20001523201 is a wasteful number, since it uses less digits than its factorization.

20001523201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818320302.

The product of its (nonzero) digits is 120, while the sum is 16.

The spelling of 20001523201 in words is "twenty billion, one million, five hundred twenty-three thousand, two hundred one".