19253977936 has 20 divisors (see below), whose sum is σ = 37307954772. Its totient is φ = 9626118656.

The previous prime is 19253977901. The next prime is 19253977937. The reversal of 19253977936 is 63977935291.

It can be written as a sum of positive squares in 2 ways, for example, as 10008001600 + 9245976336 = 100040^2 + 96156^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19253977937) 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, 151806 + ... + 248098.

Almost surely, 2^19253977936 is an apocalyptic number.

19253977936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19253977936 is a deficient number, since it is larger than the sum of its proper divisors (18053976836).

19253977936 is a wasteful number, since it uses less digits than its factorization.

19253977936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108798 (or 108792 counting only the distinct ones).

The product of its digits is 19289340, while the sum is 61.

The spelling of 19253977936 in words is "nineteen billion, two hundred fifty-three million, nine hundred seventy-seven thousand, nine hundred thirty-six".