19649442 has 32 divisors (see below), whose sum is σ = 41050944. Its totient is φ = 6264000.

The previous prime is 19649417. The next prime is 19649447. The reversal of 19649442 is 24494691.

It is a super-2 number, since 2×19649442² = 772201141822728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19649442.

It is not an unprimeable number, because it can be changed into a prime (19649447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12817 + ... + 14267.

It is an arithmetic number, because the mean of its divisors is an integer number (1282842).

Almost surely, 2^19649442 is an apocalyptic number.

19649442 is an abundant number, since it is smaller than the sum of its proper divisors (21401502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19649442 is a wasteful number, since it uses less digits than its factorization.

19649442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554.

The product of its digits is 62208, while the sum is 39.

The square root of 19649442 is about 4432.7691119660. The cubic root of 19649442 is about 269.8464696417.

The spelling of 19649442 in words is "nineteen million, six hundred forty-nine thousand, four hundred forty-two".