20812472 has 16 divisors (see below), whose sum is σ = 39463200. Its totient is φ = 10288960.

The previous prime is 20812433. The next prime is 20812483. The reversal of 20812472 is 27421802.

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 3 ways as a sum of consecutive naturals, for example, 13904 + ... + 15327.

It is an arithmetic number, because the mean of its divisors is an integer number (2466450).

Almost surely, 2^20812472 is an apocalyptic number.

It is an amenable number.

20812472 is a deficient number, since it is larger than the sum of its proper divisors (18650728).

20812472 is a wasteful number, since it uses less digits than its factorization.

20812472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29326 (or 29322 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20812472 is about 4562.0688289415. The cubic root of 20812472 is about 275.0687299285.

The spelling of 20812472 in words is "twenty million, eight hundred twelve thousand, four hundred seventy-two".