20475902 has 8 divisors (see below), whose sum is σ = 30917712. Its totient is φ = 10170000.

The previous prime is 20475893. The next prime is 20475907. The reversal of 20475902 is 20957402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33599 + ... + 34202.

It is an arithmetic number, because the mean of its divisors is an integer number (3864714).

Almost surely, 2^20475902 is an apocalyptic number.

20475902 is a deficient number, since it is larger than the sum of its proper divisors (10441810).

20475902 is a wasteful number, since it uses less digits than its factorization.

20475902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67954.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20475902 is about 4525.0306076313. The cubic root of 20475902 is about 273.5779016014.

The spelling of 20475902 in words is "twenty million, four hundred seventy-five thousand, nine hundred two".