20562639552 has 168 divisors, whose sum is σ = 72540607776. Its totient is φ = 5423099904.

The previous prime is 20562639547. The next prime is 20562639577. The reversal of 20562639552 is 25593626502.

20562639552 is a `hidden beast` number, since 2 + 0 + 5 + 6 + 2 + 639 + 5 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a junction number, because it is equal to n+sod(n) for n = 20562639498 and 20562639507.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143733 + ... + 248564.

It is an arithmetic number, because the mean of its divisors is an integer number (431789332).

Almost surely, 2^20562639552 is an apocalyptic number.

It is an amenable number.

20562639552 is an abundant number, since it is smaller than the sum of its proper divisors (51977968224).

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

20562639552 is a wasteful number, since it uses less digits than its factorization.

20562639552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392335 (or 392322 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 20562639552 in words is "twenty billion, five hundred sixty-two million, six hundred thirty-nine thousand, five hundred fifty-two".