20791874 has 4 divisors (see below), whose sum is σ = 31187814. Its totient is φ = 10395936.

The previous prime is 20791873. The next prime is 20791877. The reversal of 20791874 is 47819702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12709225 + 8082649 = 3565^2 + 2843^2 .

It is not an unprimeable number, because it can be changed into a prime (20791873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5197967 + ... + 5197970.

Almost surely, 2^20791874 is an apocalyptic number.

20791874 is a deficient number, since it is larger than the sum of its proper divisors (10395940).

20791874 is a wasteful number, since it uses less digits than its factorization.

20791874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395939.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 20791874 is about 4559.8107416865. The cubic root of 20791874 is about 274.9779552577.

The spelling of 20791874 in words is "twenty million, seven hundred ninety-one thousand, eight hundred seventy-four".