19492227420 has 48 divisors (see below), whose sum is σ = 54687696000. Its totient is φ = 5187502656.

The previous prime is 19492227401. The next prime is 19492227463. The reversal of 19492227420 is 2472229491.

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 15 ways as a sum of consecutive naturals, for example, 295582 + ... + 355461.

It is an arithmetic number, because the mean of its divisors is an integer number (1139327000).

Almost surely, 2^19492227420 is an apocalyptic number.

19492227420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19492227420 is an abundant number, since it is smaller than the sum of its proper divisors (35195468580).

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

19492227420 is a wasteful number, since it uses less digits than its factorization.

19492227420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651554 (or 651552 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 19492227420 in words is "nineteen billion, four hundred ninety-two million, two hundred twenty-seven thousand, four hundred twenty".