19740769 has 8 divisors (see below), whose sum is σ = 20666880. Its totient is φ = 18832800.

The previous prime is 19740737. The next prime is 19740781. The reversal of 19740769 is 96704791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19740769 - 2⁵ = 19740737 is a prime.

It is a super-2 number, since 2×19740769² = 779395921422722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19740719) 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 7 ways as a sum of consecutive naturals, for example, 2284 + ... + 6685.

It is an arithmetic number, because the mean of its divisors is an integer number (2583360).

Almost surely, 2^19740769 is an apocalyptic number.

It is an amenable number.

19740769 is a deficient number, since it is larger than the sum of its proper divisors (926111).

19740769 is an equidigital number, since it uses as much as digits as its factorization.

19740769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9071.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 19740769 is about 4443.0585186333. The cubic root of 19740769 is about 270.2638892329.

The spelling of 19740769 in words is "nineteen million, seven hundred forty thousand, seven hundred sixty-nine".