19740149 has 32 divisors (see below), whose sum is σ = 24665088. Its totient is φ = 15552000.

The previous prime is 19740137. The next prime is 19740157. The reversal of 19740149 is 94104791.

It is a cyclic number.

It is not a de Polignac number, because 19740149 - 2⁸ = 19739893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19740199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270377 + ... + 270449.

It is an arithmetic number, because the mean of its divisors is an integer number (770784).

Almost surely, 2^19740149 is an apocalyptic number.

It is an amenable number.

19740149 is a deficient number, since it is larger than the sum of its proper divisors (4924939).

19740149 is a wasteful number, since it uses less digits than its factorization.

19740149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 19740149 is about 4442.9887463283. The cubic root of 19740149 is about 270.2610598030.

The spelling of 19740149 in words is "nineteen million, seven hundred forty thousand, one hundred forty-nine".