20028455500 has 24 divisors (see below), whose sum is σ = 43742147904. Its totient is φ = 8011382000.

The previous prime is 20028455477. The next prime is 20028455501. The reversal of 20028455500 is 555482002.

It is a super-2 number, since 2×20028455500² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20028455501) 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, 20027956 + ... + 20028955.

It is an arithmetic number, because the mean of its divisors is an integer number (1822589496).

Almost surely, 2^20028455500 is an apocalyptic number.

20028455500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20028455500 is an abundant number, since it is smaller than the sum of its proper divisors (23713692404).

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

20028455500 is a wasteful number, since it uses less digits than its factorization.

20028455500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40056930 (or 40056918 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 20028455500 in words is "twenty billion, twenty-eight million, four hundred fifty-five thousand, five hundred".