20768942 has 8 divisors (see below), whose sum is σ = 31548000. Its totient is φ = 10252944.

The previous prime is 20768927. The next prime is 20768947. The reversal of 20768942 is 24986702.

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

It is a junction number, because it is equal to n+sod(n) for n = 20768896 and 20768905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20768947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65567 + ... + 65882.

It is an arithmetic number, because the mean of its divisors is an integer number (3943500).

Almost surely, 2^20768942 is an apocalyptic number.

20768942 is a deficient number, since it is larger than the sum of its proper divisors (10779058).

20768942 is a wasteful number, since it uses less digits than its factorization.

20768942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131530.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 20768942 is about 4557.2954699032. The cubic root of 20768942 is about 274.8768241751.

The spelling of 20768942 in words is "twenty million, seven hundred sixty-eight thousand, nine hundred forty-two".