20105674 has 4 divisors (see below), whose sum is σ = 30158514. Its totient is φ = 10052836.

The previous prime is 20105669. The next prime is 20105677. The reversal of 20105674 is 47650102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47650102 = 2 ⋅23825051.

It can be written as a sum of positive squares in only one way, i.e., 17164449 + 2941225 = 4143^2 + 1715^2 .

It is not an unprimeable number, because it can be changed into a prime (20105677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5026417 + ... + 5026420.

Almost surely, 2^20105674 is an apocalyptic number.

20105674 is a deficient number, since it is larger than the sum of its proper divisors (10052840).

20105674 is a wasteful number, since it uses less digits than its factorization.

20105674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10052839.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20105674 is about 4483.9351021173. The cubic root of 20105674 is about 271.9189944043.

Adding to 20105674 its reverse (47650102), we get a palindrome (67755776).

The spelling of 20105674 in words is "twenty million, one hundred five thousand, six hundred seventy-four".