20472688 has 20 divisors (see below), whose sum is σ = 39738280. Its totient is φ = 10217664.

The previous prime is 20472659. The next prime is 20472703. The reversal of 20472688 is 88627402.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13303 + ... + 14761.

It is an arithmetic number, because the mean of its divisors is an integer number (1986914).

Almost surely, 2^20472688 is an apocalyptic number.

It is an amenable number.

20472688 is a deficient number, since it is larger than the sum of its proper divisors (19265592).

20472688 is a wasteful number, since it uses less digits than its factorization.

20472688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344 (or 2338 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 20472688 is about 4524.6754579749. The cubic root of 20472688 is about 273.5635868004.

It can be divided in two parts, 2047268 and 8, that added together give a triangular number (2047276 = T₂₀₂₃).

The spelling of 20472688 in words is "twenty million, four hundred seventy-two thousand, six hundred eighty-eight".