18769971 has 8 divisors (see below), whose sum is σ = 27301824. Its totient is φ = 11375720.

The previous prime is 18769969. The next prime is 18769991. The reversal of 18769971 is 17996781.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18769971 - 2¹ = 18769969 is a prime.

It is a super-2 number, since 2×18769971² = 704623622681682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18769971.

It is not an unprimeable number, because it can be changed into a prime (18769901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284361 + ... + 284426.

It is an arithmetic number, because the mean of its divisors is an integer number (3412728).

Almost surely, 2^18769971 is an apocalyptic number.

18769971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18769971 is a deficient number, since it is larger than the sum of its proper divisors (8531853).

18769971 is a wasteful number, since it uses less digits than its factorization.

18769971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568801.

The product of its digits is 190512, while the sum is 48.

The square root of 18769971 is about 4332.4324576385. The cubic root of 18769971 is about 265.7589304021.

The spelling of 18769971 in words is "eighteen million, seven hundred sixty-nine thousand, nine hundred seventy-one".