20473816 has 32 divisors (see below), whose sum is σ = 42126480. Its totient is φ = 9251200.

The previous prime is 20473787. The next prime is 20473823. The reversal of 20473816 is 61837402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16746 + ... + 17926.

Almost surely, 2^20473816 is an apocalyptic number.

It is an amenable number.

20473816 is an abundant number, since it is smaller than the sum of its proper divisors (21652664).

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

20473816 is a wasteful number, since it uses less digits than its factorization.

20473816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395 (or 1391 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20473816 is about 4524.8001060820. The cubic root of 20473816 is about 273.5686109585.

The spelling of 20473816 in words is "twenty million, four hundred seventy-three thousand, eight hundred sixteen".