19789960 has 16 divisors (see below), whose sum is σ = 44527500. Its totient is φ = 7915968.

The previous prime is 19789949. The next prime is 19789969. The reversal of 19789960 is 6998791.

It can be written as a sum of positive squares in 2 ways, for example, as 18335524 + 1454436 = 4282^2 + 1206^2 .

It is not an unprimeable number, because it can be changed into a prime (19789969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247335 + ... + 247414.

Almost surely, 2^19789960 is an apocalyptic number.

19789960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19789960 is an abundant number, since it is smaller than the sum of its proper divisors (24737540).

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

19789960 is a wasteful number, since it uses less digits than its factorization.

19789960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494760 (or 494756 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 19789960 is about 4448.5907881036. The cubic root of 19789960 is about 270.4881885593.

The spelling of 19789960 in words is "nineteen million, seven hundred eighty-nine thousand, nine hundred sixty".