18950247 has 16 divisors (see below), whose sum is σ = 28243680. Its totient is φ = 12557376.

The previous prime is 18950237. The next prime is 18950273. The reversal of 18950247 is 74205981.

It is not a de Polignac number, because 18950247 - 2⁴ = 18950231 is a prime.

It is a super-2 number, since 2×18950247² = 718223722722018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18950227) 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, 2643 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (1765230).

Almost surely, 2^18950247 is an apocalyptic number.

18950247 is a deficient number, since it is larger than the sum of its proper divisors (9293433).

18950247 is a wasteful number, since it uses less digits than its factorization.

18950247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 18950247 is about 4353.1881420403. The cubic root of 18950247 is about 266.6070472620.

The spelling of 18950247 in words is "eighteen million, nine hundred fifty thousand, two hundred forty-seven".