19231836550 has 12 divisors (see below), whose sum is σ = 35771216076. Its totient is φ = 7692734600.

The previous prime is 19231836509. The next prime is 19231836557. The reversal of 19231836550 is 5563813291.

It is a junction number, because it is equal to n+sod(n) for n = 19231836497 and 19231836506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19231836557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192318316 + ... + 192318415.

It is an arithmetic number, because the mean of its divisors is an integer number (2980934673).

Almost surely, 2^19231836550 is an apocalyptic number.

19231836550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19231836550 is a deficient number, since it is larger than the sum of its proper divisors (16539379526).

19231836550 is a wasteful number, since it uses less digits than its factorization.

19231836550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384636743 (or 384636738 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 19231836550 in words is "nineteen billion, two hundred thirty-one million, eight hundred thirty-six thousand, five hundred fifty".