20464315641 has 96 divisors (see below), whose sum is σ = 39134354688. Its totient is φ = 9976504320.

The previous prime is 20464315601. The next prime is 20464315657. The reversal of 20464315641 is 14651346402.

20464315641 is a `hidden beast` number, since 2 + 0 + 4 + 6 + 4 + 3 + 1 + 5 + 641 = 666.

It is not a de Polignac number, because 20464315641 - 2¹¹ = 20464313593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20464315596 and 20464315605.

It is not an unprimeable number, because it can be changed into a prime (20464315601) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4391985 + ... + 4396641.

It is an arithmetic number, because the mean of its divisors is an integer number (407649528).

Almost surely, 2^20464315641 is an apocalyptic number.

20464315641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20464315641 is a deficient number, since it is larger than the sum of its proper divisors (18670039047).

20464315641 is a wasteful number, since it uses less digits than its factorization.

20464315641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071 (or 5068 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 20464315641 in words is "twenty billion, four hundred sixty-four million, three hundred fifteen thousand, six hundred forty-one".