19545954940 has 24 divisors (see below), whose sum is σ = 41624628192. Its totient is φ = 7708263360.

The previous prime is 19545954893. The next prime is 19545954947. The reversal of 19545954940 is 4945954591.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19545954947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6880959 + ... + 6883798.

It is an arithmetic number, because the mean of its divisors is an integer number (1734359508).

Almost surely, 2^19545954940 is an apocalyptic number.

19545954940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19545954940 is an abundant number, since it is smaller than the sum of its proper divisors (22078673252).

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

19545954940 is a wasteful number, since it uses less digits than its factorization.

19545954940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13764837 (or 13764835 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 55.

The spelling of 19545954940 in words is "nineteen billion, five hundred forty-five million, nine hundred fifty-four thousand, nine hundred forty".