19794464 has 12 divisors (see below), whose sum is σ = 38970414. Its totient is φ = 9897216.

The previous prime is 19794449. The next prime is 19794469. The reversal of 19794464 is 46449791.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 258064 = 4420^2 + 508^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19794469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309257 + ... + 309320.

Almost surely, 2^19794464 is an apocalyptic number.

It is an amenable number.

19794464 is a deficient number, since it is larger than the sum of its proper divisors (19175950).

19794464 is an equidigital number, since it uses as much as digits as its factorization.

19794464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618587 (or 618579 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 19794464 is about 4449.0969870301. The cubic root of 19794464 is about 270.5087071520.

The spelling of 19794464 in words is "nineteen million, seven hundred ninety-four thousand, four hundred sixty-four".