18938746 has 12 divisors (see below), whose sum is σ = 29200878. Its totient is φ = 9212112.

The previous prime is 18938741. The next prime is 18938771. The reversal of 18938746 is 64783981.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18584721 + 354025 = 4311^2 + 595^2 .

It is a super-2 number, since 2×18938746² = 717352200105032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18938696 and 18938705.

It is not an unprimeable number, because it can be changed into a prime (18938741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 721 + ... + 6196.

Almost surely, 2^18938746 is an apocalyptic number.

18938746 is a deficient number, since it is larger than the sum of its proper divisors (10262132).

18938746 is an equidigital number, since it uses as much as digits as its factorization.

18938746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993 (or 6956 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 18938746 is about 4351.8669556869. The cubic root of 18938746 is about 266.5531012955.

The spelling of 18938746 in words is "eighteen million, nine hundred thirty-eight thousand, seven hundred forty-six".