20575498 has 4 divisors (see below), whose sum is σ = 30863250. Its totient is φ = 10287748.

The previous prime is 20575493. The next prime is 20575517. The reversal of 20575498 is 89457502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 710649 = 4457^2 + 843^2 .

It is a super-2 number, since 2×20575498² = 846702235896008, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20575498.

It is not an unprimeable number, because it can be changed into a prime (20575493) by changing a digit.

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 as a sum of consecutive naturals, namely, 5143873 + ... + 5143876.

Almost surely, 2^20575498 is an apocalyptic number.

20575498 is a deficient number, since it is larger than the sum of its proper divisors (10287752).

20575498 is a wasteful number, since it uses less digits than its factorization.

20575498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10287751.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 20575498 is about 4536.0222662593. The cubic root of 20575498 is about 274.0207507328.

The spelling of 20575498 in words is "twenty million, five hundred seventy-five thousand, four hundred ninety-eight".