20020105661652 has 60 divisors (see below), whose sum is σ = 52474602167680. Its totient is φ = 6655760680464.

The previous prime is 20020105661651. The next prime is 20020105661657. The reversal of 20020105661652 is 25616650102002.

20020105661652 is a `hidden beast` number, since 2 + 0 + 0 + 20 + 10 + 5 + 6 + 616 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020105661651) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 81394948 + ... + 81640539.

Almost surely, 2^{20020105661652} is an apocalyptic number.

It is an amenable number.

20020105661652 is an abundant number, since it is smaller than the sum of its proper divisors (32454496506028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20020105661652 is a wasteful number, since it uses less digits than its factorization.

20020105661652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163035882 (or 163035871 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 20020105661652 its reverse (25616650102002), we get a palindrome (45636755763654).

The spelling of 20020105661652 in words is "twenty trillion, twenty billion, one hundred five million, six hundred sixty-one thousand, six hundred fifty-two".