19657039548 has 48 divisors (see below), whose sum is σ = 49597761024. Its totient is φ = 6035700480.

The previous prime is 19657039541. The next prime is 19657039561. The reversal of 19657039548 is 84593075691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19657039541) 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, 1015498 + ... + 1034673.

It is an arithmetic number, because the mean of its divisors is an integer number (1033286688).

Almost surely, 2^19657039548 is an apocalyptic number.

It is an amenable number.

19657039548 is an abundant number, since it is smaller than the sum of its proper divisors (29940721476).

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

19657039548 is a wasteful number, since it uses less digits than its factorization.

19657039548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050242 (or 2050240 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 19657039548 in words is "nineteen billion, six hundred fifty-seven million, thirty-nine thousand, five hundred forty-eight".