18740057 has 4 divisors (see below), whose sum is σ = 21417216. Its totient is φ = 16062900.

The previous prime is 18740053. The next prime is 18740063. The reversal of 18740057 is 75004781.

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: 75004781 = 541 ⋅138641.

It is not a de Polignac number, because 18740057 - 2² = 18740053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18740053) 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, 1338569 + ... + 1338582.

It is an arithmetic number, because the mean of its divisors is an integer number (5354304).

Almost surely, 2^18740057 is an apocalyptic number.

It is an amenable number.

18740057 is a deficient number, since it is larger than the sum of its proper divisors (2677159).

18740057 is an equidigital number, since it uses as much as digits as its factorization.

18740057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677158.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 18740057 is about 4328.9787479266. The cubic root of 18740057 is about 265.6176739294.

The spelling of 18740057 in words is "eighteen million, seven hundred forty thousand, fifty-seven".