19740145 has 24 divisors (see below), whose sum is σ = 26524800. Its totient is φ = 14061312.

The previous prime is 19740137. The next prime is 19740157. The reversal of 19740145 is 54104791.

It is not a de Polignac number, because 19740145 - 2³ = 19740137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27096 + ... + 27814.

It is an arithmetic number, because the mean of its divisors is an integer number (1105200).

Almost surely, 2^19740145 is an apocalyptic number.

It is an amenable number.

19740145 is a deficient number, since it is larger than the sum of its proper divisors (6784655).

19740145 is a wasteful number, since it uses less digits than its factorization.

19740145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 19740145 is about 4442.9882961808. The cubic root of 19740145 is about 270.2610415484.

The spelling of 19740145 in words is "nineteen million, seven hundred forty thousand, one hundred forty-five".