20475388 has 12 divisors (see below), whose sum is σ = 37717960. Its totient is φ = 9698832.

The previous prime is 20475383. The next prime is 20475491. The reversal of 20475388 is 88357402.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134631 + ... + 134782.

Almost surely, 2^20475388 is an apocalyptic number.

It is an amenable number.

20475388 is a deficient number, since it is larger than the sum of its proper divisors (17242572).

20475388 is a wasteful number, since it uses less digits than its factorization.

20475388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269436 (or 269434 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20475388 is about 4524.9738120789. The cubic root of 20475388 is about 273.5756124028.

The spelling of 20475388 in words is "twenty million, four hundred seventy-five thousand, three hundred eighty-eight".