20265817552 has 20 divisors (see below), whose sum is σ = 39271583680. Its totient is φ = 10131215328.

The previous prime is 20265817531. The next prime is 20265817571. The reversal of 20265817552 is 25571856202.

It is a super-2 number, since 2×20265817552² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20265817499 and 20265817508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4152 + ... + 201367.

It is an arithmetic number, because the mean of its divisors is an integer number (1963579184).

Almost surely, 2^20265817552 is an apocalyptic number.

It is an amenable number.

20265817552 is a deficient number, since it is larger than the sum of its proper divisors (19005766128).

20265817552 is a wasteful number, since it uses less digits than its factorization.

20265817552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211690 (or 211684 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 20265817552 in words is "twenty billion, two hundred sixty-five million, eight hundred seventeen thousand, five hundred fifty-two".