20199489228 has 144 divisors (see below), whose sum is σ = 54348534240. Its totient is φ = 6307891200.

The previous prime is 20199489227. The next prime is 20199489241. The reversal of 20199489228 is 82298499102.

It is not an unprimeable number, because it can be changed into a prime (20199489227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29836426 + ... + 29837102.

Almost surely, 2^20199489228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20199489228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27174267120).

20199489228 is an abundant number, since it is smaller than the sum of its proper divisors (34149045012).

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

20199489228 is a wasteful number, since it uses less digits than its factorization.

20199489228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 20199489228 in words is "twenty billion, one hundred ninety-nine million, four hundred eighty-nine thousand, two hundred twenty-eight".