19922981920 has 48 divisors (see below), whose sum is σ = 47076482880. Its totient is φ = 7967764224.

The previous prime is 19922981879. The next prime is 19922981957. The reversal of 19922981920 is 2918922991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1744549 + ... + 1755931.

It is an arithmetic number, because the mean of its divisors is an integer number (980760060).

Almost surely, 2^19922981920 is an apocalyptic number.

19922981920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19922981920 is an abundant number, since it is smaller than the sum of its proper divisors (27153500960).

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

19922981920 is a wasteful number, since it uses less digits than its factorization.

19922981920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22337 (or 22329 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 52.

The spelling of 19922981920 in words is "nineteen billion, nine hundred twenty-two million, nine hundred eighty-one thousand, nine hundred twenty".