20474442 has 24 divisors (see below), whose sum is σ = 44446116. Its totient is φ = 6811776.

The previous prime is 20474429. The next prime is 20474449. The reversal of 20474442 is 24447402.

It can be written as a sum of positive squares in 2 ways, for example, as 14814801 + 5659641 = 3849^2 + 2379^2 .

It is a super-2 number, since 2×20474442² = 838405550422728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20474449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15138 + ... + 16434.

Almost surely, 2^20474442 is an apocalyptic number.

20474442 is an abundant number, since it is smaller than the sum of its proper divisors (23971674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20474442 is a wasteful number, since it uses less digits than its factorization.

20474442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 27.

The square root of 20474442 is about 4524.8692798798. The cubic root of 20474442 is about 273.5713991084.

The spelling of 20474442 in words is "twenty million, four hundred seventy-four thousand, four hundred forty-two".