19429965 has 12 divisors (see below), whose sum is σ = 33678684. Its totient is φ = 10362624.

The previous prime is 19429957. The next prime is 19429967. The reversal of 19429965 is 56992491.

It can be written as a sum of positive squares in 2 ways, for example, as 2832489 + 16597476 = 1683^2 + 4074^2 .

It is not a de Polignac number, because 19429965 - 2³ = 19429957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 431777 = 19429965 / (1 + 9 + 4 + 2 + 9 + 9 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 19429965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19429967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215844 + ... + 215933.

It is an arithmetic number, because the mean of its divisors is an integer number (2806557).

Almost surely, 2^19429965 is an apocalyptic number.

19429965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19429965 is a deficient number, since it is larger than the sum of its proper divisors (14248719).

19429965 is a wasteful number, since it uses less digits than its factorization.

19429965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431788 (or 431785 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 19429965 is about 4407.9433980032. The cubic root of 19429965 is about 268.8380104756.

The spelling of 19429965 in words is "nineteen million, four hundred twenty-nine thousand, nine hundred sixty-five".