18520373 has 8 divisors (see below), whose sum is σ = 18966528. Its totient is φ = 18077904.

The previous prime is 18520367. The next prime is 18520379. The reversal of 18520373 is 37302581.

It is an interprime number because it is at equal distance from previous prime (18520367) and next prime (18520379).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18520373 - 2¹⁰ = 18519349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18520379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11036 + ... + 12602.

It is an arithmetic number, because the mean of its divisors is an integer number (2370816).

Almost surely, 2^18520373 is an apocalyptic number.

It is an amenable number.

18520373 is a deficient number, since it is larger than the sum of its proper divisors (446155).

18520373 is a wasteful number, since it uses less digits than its factorization.

18520373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 18520373 is about 4303.5302950020. The cubic root of 18520373 is about 264.5756731175.

It can be divided in two parts, 1852037 and 3, that multiplied together give a triangular number (5556111 = T₃₃₃₃).

The spelling of 18520373 in words is "eighteen million, five hundred twenty thousand, three hundred seventy-three".