20506722512 has 40 divisors (see below), whose sum is σ = 40723584000. Its totient is φ = 10000150272.

The previous prime is 20506722503. The next prime is 20506722517. The reversal of 20506722512 is 21522760502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20506722517) 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, 34364 + ... + 205412.

It is an arithmetic number, because the mean of its divisors is an integer number (1018089600).

Almost surely, 2^20506722512 is an apocalyptic number.

It is an amenable number.

20506722512 is a deficient number, since it is larger than the sum of its proper divisors (20216861488).

20506722512 is a wasteful number, since it uses less digits than its factorization.

20506722512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171243 (or 171237 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 20506722512 in words is "twenty billion, five hundred six million, seven hundred twenty-two thousand, five hundred twelve".