19194980220 has 72 divisors (see below), whose sum is σ = 62703609696. Its totient is φ = 4724917632.

The previous prime is 19194980197. The next prime is 19194980251. The reversal of 19194980220 is 2208949191.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4099152 + ... + 4103831.

It is an arithmetic number, because the mean of its divisors is an integer number (870883468).

Almost surely, 2^19194980220 is an apocalyptic number.

19194980220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19194980220 is an abundant number, since it is smaller than the sum of its proper divisors (43508629476).

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

19194980220 is a wasteful number, since it uses less digits than its factorization.

19194980220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203011 (or 8203006 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 19194980220 in words is "nineteen billion, one hundred ninety-four million, nine hundred eighty thousand, two hundred twenty".