20616631201 has 4 divisors (see below), whose sum is σ = 20865024432. Its totient is φ = 20368237972.

The previous prime is 20616631157. The next prime is 20616631219. The reversal of 20616631201 is 10213661602.

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 20616631201 - 2⁷ = 20616631073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20616631201.

It is not an unprimeable number, because it can be changed into a prime (20616631241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124196491 + ... + 124196656.

It is an arithmetic number, because the mean of its divisors is an integer number (5216256108).

Almost surely, 2^20616631201 is an apocalyptic number.

It is an amenable number.

20616631201 is a deficient number, since it is larger than the sum of its proper divisors (248393231).

20616631201 is an equidigital number, since it uses as much as digits as its factorization.

20616631201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248393230.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 20616631201 in words is "twenty billion, six hundred sixteen million, six hundred thirty-one thousand, two hundred one".