20512602653 has 16 divisors (see below), whose sum is σ = 21266473536. Its totient is φ = 19771866240.

The previous prime is 20512602637. The next prime is 20512602689. The reversal of 20512602653 is 35620621502.

It is a cyclic number.

It is not a de Polignac number, because 20512602653 - 2⁴ = 20512602637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512602053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3784001 + ... + 3789417.

It is an arithmetic number, because the mean of its divisors is an integer number (1329154596).

Almost surely, 2^20512602653 is an apocalyptic number.

It is an amenable number.

20512602653 is a deficient number, since it is larger than the sum of its proper divisors (753870883).

20512602653 is a wasteful number, since it uses less digits than its factorization.

20512602653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20512602653 in words is "twenty billion, five hundred twelve million, six hundred two thousand, six hundred fifty-three".