18769690 has 16 divisors (see below), whose sum is σ = 34115328. Its totient is φ = 7434576.

The previous prime is 18769661. The next prime is 18769697. The reversal of 18769690 is 9696781.

It is a super-2 number, since 2×18769690² = 704602525392200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18769690.

It is not an unprimeable number, because it can be changed into a prime (18769697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8082 + ... + 10141.

It is an arithmetic number, because the mean of its divisors is an integer number (2132208).

Almost surely, 2^18769690 is an apocalyptic number.

18769690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18769690 is a deficient number, since it is larger than the sum of its proper divisors (15345638).

18769690 is a wasteful number, since it uses less digits than its factorization.

18769690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 18769690 is about 4332.4000276983. The cubic root of 18769690 is about 265.7576041946.

The spelling of 18769690 in words is "eighteen million, seven hundred sixty-nine thousand, six hundred ninety".