19780474 has 16 divisors (see below), whose sum is σ = 34109568. Its totient is φ = 8427312.

The previous prime is 19780457. The next prime is 19780487. The reversal of 19780474 is 47408791.

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, 1662 + ... + 6505.

It is an arithmetic number, because the mean of its divisors is an integer number (2131848).

Almost surely, 2^19780474 is an apocalyptic number.

19780474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19780474 is a deficient number, since it is larger than the sum of its proper divisors (14329094).

19780474 is a wasteful number, since it uses less digits than its factorization.

19780474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8349.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 19780474 is about 4447.5244799776. The cubic root of 19780474 is about 270.4449635935. Note that the first 3 decimals are identical.

The spelling of 19780474 in words is "nineteen million, seven hundred eighty thousand, four hundred seventy-four".