20645264241 has 12 divisors (see below), whose sum is σ = 34081071232. Its totient is φ = 11797293816.

The previous prime is 20645264221. The next prime is 20645264243. The reversal of 20645264241 is 14246254602.

20645264241 is a `hidden beast` number, since 2 + 0 + 6 + 4 + 5 + 2 + 642 + 4 + 1 = 666.

It is not a de Polignac number, because 20645264241 - 2⁷ = 20645264113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20645264196 and 20645264205.

It is not an unprimeable number, because it can be changed into a prime (20645264243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163851241 + ... + 163851366.

Almost surely, 2^20645264241 is an apocalyptic number.

20645264241 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20645264241 is a deficient number, since it is larger than the sum of its proper divisors (13435806991).

20645264241 is a wasteful number, since it uses less digits than its factorization.

20645264241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327702620 (or 327702617 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 20645264241 in words is "twenty billion, six hundred forty-five million, two hundred sixty-four thousand, two hundred forty-one".