19494946 has 4 divisors (see below), whose sum is σ = 29242422. Its totient is φ = 9747472.

The previous prime is 19494911. The next prime is 19494947. The reversal of 19494946 is 64949491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 38025 = 4411^2 + 195^2 .

It is a super-3 number, since 3×19494946³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19494896 and 19494905.

It is not an unprimeable number, because it can be changed into a prime (19494947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4873735 + ... + 4873738.

Almost surely, 2^19494946 is an apocalyptic number.

19494946 is a deficient number, since it is larger than the sum of its proper divisors (9747476).

19494946 is an equidigital number, since it uses as much as digits as its factorization.

19494946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747475.

The product of its digits is 279936, while the sum is 46.

The square root of 19494946 is about 4415.3081432670. The cubic root of 19494946 is about 269.1373749570.

The spelling of 19494946 in words is "nineteen million, four hundred ninety-four thousand, nine hundred forty-six".