19740684 has 48 divisors (see below), whose sum is σ = 47765088. Its totient is φ = 6340608.

The previous prime is 19740667. The next prime is 19740691. The reversal of 19740684 is 48604791.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76684 + ... + 76940.

It is an arithmetic number, because the mean of its divisors is an integer number (995106).

Almost surely, 2^19740684 is an apocalyptic number.

It is an amenable number.

19740684 is an abundant number, since it is smaller than the sum of its proper divisors (28024404).

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

19740684 is a wasteful number, since it uses less digits than its factorization.

19740684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 19740684 is about 4443.0489531402. The cubic root of 19740684 is about 270.2635013307.

The spelling of 19740684 in words is "nineteen million, seven hundred forty thousand, six hundred eighty-four".