18973975 has 12 divisors (see below), whose sum is σ = 24339960. Its totient is φ = 14655200.

The previous prime is 18973949. The next prime is 18973979. The reversal of 18973975 is 57937981.

It is not a de Polignac number, because 18973975 - 2¹³ = 18965783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12361 + ... + 13810.

It is an arithmetic number, because the mean of its divisors is an integer number (2028330).

Almost surely, 2^18973975 is an apocalyptic number.

18973975 is a deficient number, since it is larger than the sum of its proper divisors (5365985).

18973975 is a wasteful number, since it uses less digits than its factorization.

18973975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26210 (or 26205 counting only the distinct ones).

The product of its digits is 476280, while the sum is 49.

The square root of 18973975 is about 4355.9126483436. The cubic root of 18973975 is about 266.7182756016.

The spelling of 18973975 in words is "eighteen million, nine hundred seventy-three thousand, nine hundred seventy-five".