18770913 has 16 divisors (see below), whose sum is σ = 31781760. Its totient is φ = 10726128.

The previous prime is 18770911. The next prime is 18770929. The reversal of 18770913 is 31907781.

It is not a de Polignac number, because 18770913 - 2¹ = 18770911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18770911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49470 + ... + 49847.

It is an arithmetic number, because the mean of its divisors is an integer number (1986360).

Almost surely, 2^18770913 is an apocalyptic number.

It is an amenable number.

18770913 is a deficient number, since it is larger than the sum of its proper divisors (13010847).

18770913 is an equidigital number, since it uses as much as digits as its factorization.

18770913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99333 (or 99327 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 18770913 is about 4332.5411711835. The cubic root of 18770913 is about 265.7633761686.

It can be divided in two parts, 18770 and 913, that added together give a 9-th power (19683 = 3⁹).

The spelling of 18770913 in words is "eighteen million, seven hundred seventy thousand, nine hundred thirteen".