19754474838 has 32 divisors (see below), whose sum is σ = 47529565440. Its totient is φ = 5347075680.

The previous prime is 19754474833. The next prime is 19754474849. The reversal of 19754474838 is 83847445791.

It is a super-2 number, since 2×19754474838² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19754474833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12376693 + ... + 12378288.

It is an arithmetic number, because the mean of its divisors is an integer number (1485298920).

Almost surely, 2^19754474838 is an apocalyptic number.

19754474838 is an abundant number, since it is smaller than the sum of its proper divisors (27775090602).

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

19754474838 is a wasteful number, since it uses less digits than its factorization.

19754474838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24755012.

The product of its digits is 27095040, while the sum is 60.

The spelling of 19754474838 in words is "nineteen billion, seven hundred fifty-four million, four hundred seventy-four thousand, eight hundred thirty-eight".