19856148 has 36 divisors (see below), whose sum is σ = 50174208. Its totient is φ = 6108960.

The previous prime is 19856141. The next prime is 19856149. The reversal of 19856148 is 84165891.

It is a super-2 number, since 2×19856148² = 788533226795808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19856141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2868 + ... + 6923.

It is an arithmetic number, because the mean of its divisors is an integer number (1393728).

Almost surely, 2^19856148 is an apocalyptic number.

It is an amenable number.

19856148 is an abundant number, since it is smaller than the sum of its proper divisors (30318060).

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

19856148 is a wasteful number, since it uses less digits than its factorization.

19856148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9824 (or 9809 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 19856148 is about 4456.0237880873. The cubic root of 19856148 is about 270.7894044307.

The spelling of 19856148 in words is "nineteen million, eight hundred fifty-six thousand, one hundred forty-eight".