20802525550 has 12 divisors (see below), whose sum is σ = 38692697616. Its totient is φ = 8321010200.

The previous prime is 20802525547. The next prime is 20802525551. The reversal of 20802525550 is 5552520802.

It is a happy number.

It is a super-3 number, since 3×20802525550³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20802525551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208025206 + ... + 208025305.

It is an arithmetic number, because the mean of its divisors is an integer number (3224391468).

Almost surely, 2^20802525550 is an apocalyptic number.

20802525550 is a deficient number, since it is larger than the sum of its proper divisors (17890172066).

20802525550 is a wasteful number, since it uses less digits than its factorization.

20802525550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416050523 (or 416050518 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

It can be divided in two parts, 2080252 and 5550, that added together give a palindrome (2085802).

The spelling of 20802525550 in words is "twenty billion, eight hundred two million, five hundred twenty-five thousand, five hundred fifty".