19906797 has 8 divisors (see below), whose sum is σ = 26805600. Its totient is φ = 13139600.

The previous prime is 19906793. The next prime is 19906811. The reversal of 19906797 is 79760991.

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 19906797 - 2² = 19906793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19906793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32547 + ... + 33152.

It is an arithmetic number, because the mean of its divisors is an integer number (3350700).

Almost surely, 2^19906797 is an apocalyptic number.

It is an amenable number.

19906797 is a deficient number, since it is larger than the sum of its proper divisors (6898803).

19906797 is a wasteful number, since it uses less digits than its factorization.

19906797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65803.

The product of its (nonzero) digits is 214326, while the sum is 48.

The square root of 19906797 is about 4461.7033742731. The cubic root of 19906797 is about 271.0194518610.

The spelling of 19906797 in words is "nineteen million, nine hundred six thousand, seven hundred ninety-seven".