20506253072 has 40 divisors (see below), whose sum is σ = 40960134336. Its totient is φ = 9938007936.

The previous prime is 20506253071. The next prime is 20506253099. The reversal of 20506253072 is 27035260502.

It is not an unprimeable number, because it can be changed into a prime (20506253071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89843 + ... + 221549.

Almost surely, 2^20506253072 is an apocalyptic number.

It is an amenable number.

20506253072 is a deficient number, since it is larger than the sum of its proper divisors (20453881264).

20506253072 is a wasteful number, since it uses less digits than its factorization.

20506253072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132015 (or 132009 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 20506253072 in words is "twenty billion, five hundred six million, two hundred fifty-three thousand, seventy-two".