19651970148 has 24 divisors (see below), whose sum is σ = 48551926752. Its totient is φ = 6165323904.

The previous prime is 19651970137. The next prime is 19651970171. The reversal of 19651970148 is 84107915691.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 19651970148.

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, 48166390 + ... + 48166797.

It is an arithmetic number, because the mean of its divisors is an integer number (2022996948).

Almost surely, 2^19651970148 is an apocalyptic number.

It is an amenable number.

19651970148 is an abundant number, since it is smaller than the sum of its proper divisors (28899956604).

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

19651970148 is a wasteful number, since it uses less digits than its factorization.

19651970148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96333211 (or 96333209 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 19651970148 in words is "nineteen billion, six hundred fifty-one million, nine hundred seventy thousand, one hundred forty-eight".