20310974 has 4 divisors (see below), whose sum is σ = 30466464. Its totient is φ = 10155486.

The previous prime is 20310973. The next prime is 20311043. The reversal of 20310974 is 47901302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47901302 = 2 ⋅23950651.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077742 + ... + 5077745.

It is an arithmetic number, because the mean of its divisors is an integer number (7616616).

Almost surely, 2^20310974 is an apocalyptic number.

20310974 is a deficient number, since it is larger than the sum of its proper divisors (10155490).

20310974 is a wasteful number, since it uses less digits than its factorization.

20310974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155489.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20310974 is about 4506.7697966504. The cubic root of 20310974 is about 272.8413879150.

The spelling of 20310974 in words is "twenty million, three hundred ten thousand, nine hundred seventy-four".