18496949 has 2 divisors, whose sum is σ = 18496950. Its totient is φ = 18496948.

The previous prime is 18496939. The next prime is 18496963. The reversal of 18496949 is 94969481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 2640625 = 3982^2 + 1625^2 .

It is a cyclic number.

It is not a de Polignac number, because 18496949 - 2¹² = 18492853 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18496897 and 18496906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18496909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9248474 + 9248475.

It is an arithmetic number, because the mean of its divisors is an integer number (9248475).

Almost surely, 2^18496949 is an apocalyptic number.

It is an amenable number.

18496949 is a deficient number, since it is larger than the sum of its proper divisors (1).

18496949 is an equidigital number, since it uses as much as digits as its factorization.

18496949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 18496949 is about 4300.8079473513. The cubic root of 18496949 is about 264.4640836591.

The spelling of 18496949 in words is "eighteen million, four hundred ninety-six thousand, nine hundred forty-nine".