19472956240 has 20 divisors (see below), whose sum is σ = 45274623444. Its totient is φ = 7789182464.

The previous prime is 19472956231. The next prime is 19472956253. The reversal of 19472956240 is 4265927491.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8417695504 + 11055260736 = 91748^2 + 105144^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121705897 + ... + 121706056.

Almost surely, 2^19472956240 is an apocalyptic number.

19472956240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19472956240 is an abundant number, since it is smaller than the sum of its proper divisors (25801667204).

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

19472956240 is a wasteful number, since it uses less digits than its factorization.

19472956240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243411966 (or 243411960 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 19472956240 in words is "nineteen billion, four hundred seventy-two million, nine hundred fifty-six thousand, two hundred forty".