20472665652 has 48 divisors (see below), whose sum is σ = 54907540800. Its totient is φ = 6588902880.

The previous prime is 20472665651. The next prime is 20472665659. The reversal of 20472665652 is 25656627402.

20472665652 is a `hidden beast` number, since 20 + 4 + 7 + 2 + 66 + 565 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20472665598 and 20472665607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472665651) 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, 3265174 + ... + 3271437.

It is an arithmetic number, because the mean of its divisors is an integer number (1143907100).

Almost surely, 2^20472665652 is an apocalyptic number.

It is an amenable number.

20472665652 is an abundant number, since it is smaller than the sum of its proper divisors (34434875148).

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

20472665652 is a wasteful number, since it uses less digits than its factorization.

20472665652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536653 (or 6536645 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 20472665652 in words is "twenty billion, four hundred seventy-two million, six hundred sixty-five thousand, six hundred fifty-two".