18706937 has 4 divisors (see below), whose sum is σ = 18830976. Its totient is φ = 18582900.

The previous prime is 18706913. The next prime is 18706951. The reversal of 18706937 is 73960781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73960781 = 6791 ⋅10891.

It is a cyclic number.

It is not a de Polignac number, because 18706937 - 2⁶ = 18706873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18706894 and 18706903.

It is not an unprimeable number, because it can be changed into a prime (18706967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61793 + ... + 62094.

It is an arithmetic number, because the mean of its divisors is an integer number (4707744).

Almost surely, 2^18706937 is an apocalyptic number.

It is an amenable number.

18706937 is a deficient number, since it is larger than the sum of its proper divisors (124039).

18706937 is a wasteful number, since it uses less digits than its factorization.

18706937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124038.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 18706937 is about 4325.1516736411. The cubic root of 18706937 is about 265.4611029893.

The spelling of 18706937 in words is "eighteen million, seven hundred six thousand, nine hundred thirty-seven".