19755940 has 12 divisors (see below), whose sum is σ = 41487516. Its totient is φ = 7902368.

The previous prime is 19755937. The next prime is 19755943. The reversal of 19755940 is 4955791.

It is an interprime number because it is at equal distance from previous prime (19755937) and next prime (19755943).

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 10863616 = 2982^2 + 3296^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19755893 and 19755902.

It is not an unprimeable number, because it can be changed into a prime (19755943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493879 + ... + 493918.

It is an arithmetic number, because the mean of its divisors is an integer number (3457293).

Almost surely, 2^19755940 is an apocalyptic number.

19755940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19755940 is an abundant number, since it is smaller than the sum of its proper divisors (21731576).

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

19755940 is a wasteful number, since it uses less digits than its factorization.

19755940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987806 (or 987804 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 19755940 is about 4444.7654606289. The cubic root of 19755940 is about 270.3331051040. Note that the first 3 decimals are identical.

The spelling of 19755940 in words is "nineteen million, seven hundred fifty-five thousand, nine hundred forty".