19236434550 has 24 divisors (see below), whose sum is σ = 47706358056. Its totient is φ = 5129715840.

The previous prime is 19236434533. The next prime is 19236434579. The reversal of 19236434550 is 5543463291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64121299 + ... + 64121598.

It is an arithmetic number, because the mean of its divisors is an integer number (1987764919).

Almost surely, 2^19236434550 is an apocalyptic number.

19236434550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19236434550 is an abundant number, since it is smaller than the sum of its proper divisors (28469923506).

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

19236434550 is a wasteful number, since it uses less digits than its factorization.

19236434550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128242912 (or 128242907 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 19236434550 in words is "nineteen billion, two hundred thirty-six million, four hundred thirty-four thousand, five hundred fifty".