19970765 has 8 divisors (see below), whose sum is σ = 24073728. Its totient is φ = 15904080.

The previous prime is 19970761. The next prime is 19970777. The reversal of 19970765 is 56707991.

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

It is not a de Polignac number, because 19970765 - 2² = 19970761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19970761) 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 7 ways as a sum of consecutive naturals, for example, 7841 + ... + 10070.

It is an arithmetic number, because the mean of its divisors is an integer number (3009216).

Almost surely, 2^19970765 is an apocalyptic number.

It is an amenable number.

19970765 is a deficient number, since it is larger than the sum of its proper divisors (4102963).

19970765 is a wasteful number, since it uses less digits than its factorization.

19970765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18139.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 19970765 is about 4468.8661873008. The cubic root of 19970765 is about 271.3094371651.

The spelling of 19970765 in words is "nineteen million, nine hundred seventy thousand, seven hundred sixty-five".