20475499 has 6 divisors (see below), whose sum is σ = 22506260. Its totient is φ = 18613980.

The previous prime is 20475491. The next prime is 20475527. The reversal of 20475499 is 99457402.

It is not a de Polignac number, because 20475499 - 2³ = 20475491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20475491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84489 + ... + 84730.

Almost surely, 2^20475499 is an apocalyptic number.

20475499 is a deficient number, since it is larger than the sum of its proper divisors (2030761).

20475499 is a wasteful number, since it uses less digits than its factorization.

20475499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169241 (or 169230 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20475499 is about 4524.9860773266. The cubic root of 20475499 is about 273.5761067661.

The spelling of 20475499 in words is "twenty million, four hundred seventy-five thousand, four hundred ninety-nine".