19949450 has 12 divisors (see below), whose sum is σ = 37106070. Its totient is φ = 7979760.

The previous prime is 19949431. The next prime is 19949453. The reversal of 19949450 is 5494991.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7678441 + 12271009 = 2771^2 + 3503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19949398 and 19949407.

It is not an unprimeable number, because it can be changed into a prime (19949453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199445 + ... + 199544.

Almost surely, 2^19949450 is an apocalyptic number.

19949450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19949450 is a deficient number, since it is larger than the sum of its proper divisors (17156620).

19949450 is a wasteful number, since it uses less digits than its factorization.

19949450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399001 (or 398996 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 19949450 is about 4466.4807175225. The cubic root of 19949450 is about 271.2128790332.

The spelling of 19949450 in words is "nineteen million, nine hundred forty-nine thousand, four hundred fifty".