19780148 has 12 divisors (see below), whose sum is σ = 34823712. Its totient is φ = 9830520.

The previous prime is 19780141. The next prime is 19780157. The reversal of 19780148 is 84108791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19780141) 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, 14138 + ... + 15473.

It is an arithmetic number, because the mean of its divisors is an integer number (2901976).

Almost surely, 2^19780148 is an apocalyptic number.

It is an amenable number.

19780148 is a deficient number, since it is larger than the sum of its proper divisors (15043564).

19780148 is a wasteful number, since it uses less digits than its factorization.

19780148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29782 (or 29780 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 19780148 is about 4447.4878302251. The cubic root of 19780148 is about 270.4434778599.

The spelling of 19780148 in words is "nineteen million, seven hundred eighty thousand, one hundred forty-eight".