19944243051 has 16 divisors (see below), whose sum is σ = 27526003200. Its totient is φ = 12829879328.

The previous prime is 19944243029. The next prime is 19944243083. The reversal of 19944243051 is 15034244991.

It is not a de Polignac number, because 19944243051 - 2¹⁰ = 19944242027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19944242994 and 19944243012.

It is not an unprimeable number, because it can be changed into a prime (19944243751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76270 + ... + 213788.

It is an arithmetic number, because the mean of its divisors is an integer number (1720375200).

Almost surely, 2^19944243051 is an apocalyptic number.

19944243051 is a deficient number, since it is larger than the sum of its proper divisors (7581760149).

19944243051 is a wasteful number, since it uses less digits than its factorization.

19944243051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139218.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 19944243051 in words is "nineteen billion, nine hundred forty-four million, two hundred forty-three thousand, fifty-one".