20791934 has 4 divisors (see below), whose sum is σ = 31187904. Its totient is φ = 10395966.

The previous prime is 20791877. The next prime is 20791937. The reversal of 20791934 is 43919702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43919702 = 2 ⋅21959851.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20791894 and 20791903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20791937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5197982 + ... + 5197985.

It is an arithmetic number, because the mean of its divisors is an integer number (7796976).

Almost surely, 2^20791934 is an apocalyptic number.

20791934 is a deficient number, since it is larger than the sum of its proper divisors (10395970).

20791934 is a wasteful number, since it uses less digits than its factorization.

20791934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395969.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20791934 is about 4559.8173209022. The cubic root of 20791934 is about 274.9782197626.

The spelling of 20791934 in words is "twenty million, seven hundred ninety-one thousand, nine hundred thirty-four".