19740490 has 64 divisors (see below), whose sum is σ = 45785088. Its totient is φ = 5947200.

The previous prime is 19740473. The next prime is 19740491. The reversal of 19740490 is 9404791.

It is not an unprimeable number, because it can be changed into a prime (19740491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23457 + ... + 24283.

It is an arithmetic number, because the mean of its divisors is an integer number (715392).

Almost surely, 2^19740490 is an apocalyptic number.

19740490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19740490 is an abundant number, since it is smaller than the sum of its proper divisors (26044598).

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

19740490 is a wasteful number, since it uses less digits than its factorization.

19740490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 19740490 is about 4443.0271212316. The cubic root of 19740490 is about 270.2626159967.

The spelling of 19740490 in words is "nineteen million, seven hundred forty thousand, four hundred ninety".