20474474 has 4 divisors (see below), whose sum is σ = 30711714. Its totient is φ = 10237236.

The previous prime is 20474473. The next prime is 20474479. The reversal of 20474474 is 47447402.

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., 11730625 + 8743849 = 3425^2 + 2957^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20474474.

It is not an unprimeable number, because it can be changed into a prime (20474473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5118617 + ... + 5118620.

Almost surely, 2^20474474 is an apocalyptic number.

20474474 is a deficient number, since it is larger than the sum of its proper divisors (10237240).

20474474 is a wasteful number, since it uses less digits than its factorization.

20474474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10237239.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 20474474 is about 4524.8728158922. The cubic root of 20474474 is about 273.5715416321.

The spelling of 20474474 in words is "twenty million, four hundred seventy-four thousand, four hundred seventy-four".