20194556928 has 704 divisors, whose sum is σ = 71310274560. Its totient is φ = 4938006528.

The previous prime is 20194556927. The next prime is 20194556953. The reversal of 20194556928 is 82965549102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194556927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381029350 + ... + 381029402.

Almost surely, 2^20194556928 is an apocalyptic number.

20194556928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20194556928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35655137280).

20194556928 is an abundant number, since it is smaller than the sum of its proper divisors (51115717632).

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

20194556928 is a wasteful number, since it uses less digits than its factorization.

20194556928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 20194556928 in words is "twenty billion, one hundred ninety-four million, five hundred fifty-six thousand, nine hundred twenty-eight".