19940037 has 16 divisors (see below), whose sum is σ = 29557248. Its totient is φ = 11874240.

The previous prime is 19940033. The next prime is 19940047. The reversal of 19940037 is 73004991.

It is not a de Polignac number, because 19940037 - 2² = 19940033 is a prime.

It is a super-2 number, since 2×19940037² = 795210151122738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19940033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7038 + ... + 9455.

It is an arithmetic number, because the mean of its divisors is an integer number (1847328).

Almost surely, 2^19940037 is an apocalyptic number.

It is an amenable number.

19940037 is a deficient number, since it is larger than the sum of its proper divisors (9617211).

19940037 is a wasteful number, since it uses less digits than its factorization.

19940037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16540.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 19940037 is about 4465.4268552961. The cubic root of 19940037 is about 271.1702157274.

The spelling of 19940037 in words is "nineteen million, nine hundred forty thousand, thirty-seven".