19749330 has 24 divisors (see below), whose sum is σ = 51348492. Its totient is φ = 5266464.

The previous prime is 19749329. The next prime is 19749343. The reversal of 19749330 is 3394791.

It can be written as a sum of positive squares in 2 ways, for example, as 17614809 + 2134521 = 4197^2 + 1461^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 109629 + ... + 109808.

Almost surely, 2^19749330 is an apocalyptic number.

19749330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19749330 is an abundant number, since it is smaller than the sum of its proper divisors (31599162).

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

19749330 is a wasteful number, since it uses less digits than its factorization.

19749330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219450 (or 219447 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 19749330 is about 4444.0218271291. The cubic root of 19749330 is about 270.3029521280.

The spelling of 19749330 in words is "nineteen million, seven hundred forty-nine thousand, three hundred thirty".