20201531641 has 8 divisors (see below), whose sum is σ = 20877497600. Its totient is φ = 19527084720.

The previous prime is 20201531639. The next prime is 20201531687. The reversal of 20201531641 is 14613510202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20201531641 - 2¹ = 20201531639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201531621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352686 + ... + 405943.

It is an arithmetic number, because the mean of its divisors is an integer number (2609687200).

Almost surely, 2^20201531641 is an apocalyptic number.

It is an amenable number.

20201531641 is a deficient number, since it is larger than the sum of its proper divisors (675965959).

20201531641 is an equidigital number, since it uses as much as digits as its factorization.

20201531641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759519.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 20201531641 in words is "twenty billion, two hundred one million, five hundred thirty-one thousand, six hundred forty-one".