20768619 has 8 divisors (see below), whose sum is σ = 27714960. Its totient is φ = 13834016.

The previous prime is 20768617. The next prime is 20768711. The reversal of 20768619 is 91686702.

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 20768619 - 2¹ = 20768617 is a prime.

It is a super-2 number, since 2×20768619² = 862671070334322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20768617) 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, 2797 + ... + 7025.

It is an arithmetic number, because the mean of its divisors is an integer number (3464370).

Almost surely, 2^20768619 is an apocalyptic number.

20768619 is a deficient number, since it is larger than the sum of its proper divisors (6946341).

20768619 is a wasteful number, since it uses less digits than its factorization.

20768619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5869.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20768619 is about 4557.2600320807. The cubic root of 20768619 is about 274.8753992001.

The spelling of 20768619 in words is "twenty million, seven hundred sixty-eight thousand, six hundred nineteen".