20554268028 has 48 divisors (see below), whose sum is σ = 54827345664. Its totient is φ = 5870937600.

The previous prime is 20554268017. The next prime is 20554268029. The reversal of 20554268028 is 82086245502.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554268029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270003 + ... + 337653.

It is an arithmetic number, because the mean of its divisors is an integer number (1142236368).

Almost surely, 2^20554268028 is an apocalyptic number.

20554268028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20554268028 is an abundant number, since it is smaller than the sum of its proper divisors (34273077636).

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

20554268028 is a wasteful number, since it uses less digits than its factorization.

20554268028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71282 (or 71280 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 42.

The spelling of 20554268028 in words is "twenty billion, five hundred fifty-four million, two hundred sixty-eight thousand, twenty-eight".