20662512653 has 8 divisors (see below), whose sum is σ = 20780390400. Its totient is φ = 20544957648.

The previous prime is 20662512641. The next prime is 20662512683. The reversal of 20662512653 is 35621526602.

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 20662512653 - 2¹² = 20662508557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662512613) 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, 48308 + ... + 208946.

It is an arithmetic number, because the mean of its divisors is an integer number (2597548800).

Almost surely, 2^20662512653 is an apocalyptic number.

It is an amenable number.

20662512653 is a deficient number, since it is larger than the sum of its proper divisors (117877747).

20662512653 is a wasteful number, since it uses less digits than its factorization.

20662512653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161371.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 20662512653 in words is "twenty billion, six hundred sixty-two million, five hundred twelve thousand, six hundred fifty-three".