19503913650 has 48 divisors (see below), whose sum is σ = 52090457664. Its totient is φ = 4800962880.

The previous prime is 19503913643. The next prime is 19503913679. The reversal of 19503913650 is 5631930591.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4999054 + ... + 5002953.

It is an arithmetic number, because the mean of its divisors is an integer number (1085217868).

Almost surely, 2^19503913650 is an apocalyptic number.

19503913650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19503913650 is an abundant number, since it is smaller than the sum of its proper divisors (32586544014).

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

19503913650 is a wasteful number, since it uses less digits than its factorization.

19503913650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10002035 (or 10002030 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 42.

The spelling of 19503913650 in words is "nineteen billion, five hundred three million, nine hundred thirteen thousand, six hundred fifty".