19220487956 has 24 divisors (see below), whose sum is σ = 34431433344. Its totient is φ = 9383109120.

The previous prime is 19220487893. The next prime is 19220487973. The reversal of 19220487956 is 65978402291.

It is a junction number, because it is equal to n+sod(n) for n = 19220487898 and 19220487907.

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 7 ways as a sum of consecutive naturals, for example, 453221 + ... + 493811.

It is an arithmetic number, because the mean of its divisors is an integer number (1434643056).

Almost surely, 2^19220487956 is an apocalyptic number.

It is an amenable number.

19220487956 is a deficient number, since it is larger than the sum of its proper divisors (15210945388).

19220487956 is a wasteful number, since it uses less digits than its factorization.

19220487956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43391 (or 43389 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 19220487956 in words is "nineteen billion, two hundred twenty million, four hundred eighty-seven thousand, nine hundred fifty-six".