20464744641 has 24 divisors (see below), whose sum is σ = 30056880672. Its totient is φ = 12376214400.

The previous prime is 20464744609. The next prime is 20464744669. The reversal of 20464744641 is 14644746402.

It is not a de Polignac number, because 20464744641 - 2⁵ = 20464744609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20464744593 and 20464744602.

It is not an unprimeable number, because it can be changed into a prime (20464744691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109161 + ... + 229881.

It is an arithmetic number, because the mean of its divisors is an integer number (1252370028).

Almost surely, 2^20464744641 is an apocalyptic number.

It is an amenable number.

20464744641 is a deficient number, since it is larger than the sum of its proper divisors (9592136031).

20464744641 is a wasteful number, since it uses less digits than its factorization.

20464744641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121213 (or 121202 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 42.

The spelling of 20464744641 in words is "twenty billion, four hundred sixty-four million, seven hundred forty-four thousand, six hundred forty-one".