18540763 has 4 divisors (see below), whose sum is σ = 18556560. Its totient is φ = 18524968.

The previous prime is 18540757. The next prime is 18540779. The reversal of 18540763 is 36704581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36704581 = 17 ⋅2159093.

It is a cyclic number.

It is not a de Polignac number, because 18540763 - 2¹³ = 18532571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18540703) 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, 5983 + ... + 8536.

It is an arithmetic number, because the mean of its divisors is an integer number (4639140).

Almost surely, 2^18540763 is an apocalyptic number.

18540763 is a deficient number, since it is larger than the sum of its proper divisors (15797).

18540763 is a wasteful number, since it uses less digits than its factorization.

18540763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15796.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 18540763 is about 4305.8986286256. The cubic root of 18540763 is about 264.6727323474.

The spelling of 18540763 in words is "eighteen million, five hundred forty thousand, seven hundred sixty-three".