19698740 has 24 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 7851680.

The previous prime is 19698739. The next prime is 19698751. The reversal of 19698740 is 4789691.

It is a junction number, because it is equal to n+sod(n) for n = 19698691 and 19698700.

It is a congruent number.

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, 4637 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^19698740 is an apocalyptic number.

19698740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19698740 is an abundant number, since it is smaller than the sum of its proper divisors (21814732).

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

19698740 is a wasteful number, since it uses less digits than its factorization.

19698740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487 (or 3485 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 19698740 is about 4438.3262611034. The cubic root of 19698740 is about 270.0719515603.

The spelling of 19698740 in words is "nineteen million, six hundred ninety-eight thousand, seven hundred forty".