19790118 has 24 divisors (see below), whose sum is σ = 42974568. Its totient is φ = 6581952.

The previous prime is 19790117. The next prime is 19790119. The reversal of 19790118 is 81109791.

It is an interprime number because it is at equal distance from previous prime (19790117) and next prime (19790119).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19790117) 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, 9630 + ... + 11502.

It is an arithmetic number, because the mean of its divisors is an integer number (1790607).

Almost surely, 2^19790118 is an apocalyptic number.

19790118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19790118 is an abundant number, since it is smaller than the sum of its proper divisors (23184450).

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

19790118 is a wasteful number, since it uses less digits than its factorization.

19790118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468 (or 2465 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 19790118 is about 4448.6085465008. The cubic root of 19790118 is about 270.4889084027.

The spelling of 19790118 in words is "nineteen million, seven hundred ninety thousand, one hundred eighteen".