19927946152 has 32 divisors (see below), whose sum is σ = 38092761000. Its totient is φ = 9770102784.

The previous prime is 19927946131. The next prime is 19927946161. The reversal of 19927946152 is 25164972991.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15245828676 + 4682117476 = 123474^2 + 68426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19927946093 and 19927946102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740224 + ... + 766672.

Almost surely, 2^19927946152 is an apocalyptic number.

It is an amenable number.

19927946152 is a deficient number, since it is larger than the sum of its proper divisors (18164814848).

19927946152 is a wasteful number, since it uses less digits than its factorization.

19927946152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28285 (or 28281 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 55.

The spelling of 19927946152 in words is "nineteen billion, nine hundred twenty-seven million, nine hundred forty-six thousand, one hundred fifty-two".