20016475 has 6 divisors (see below), whose sum is σ = 24820460. Its totient is φ = 16013160.

The previous prime is 20016461. The next prime is 20016499. The reversal of 20016475 is 57461002.

It is not a de Polignac number, because 20016475 - 2¹¹ = 20014427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 800659 = 20016475 / (2 + 0 + 0 + 1 + 6 + 4 + 7 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 400305 + ... + 400354.

Almost surely, 2^20016475 is an apocalyptic number.

20016475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20016475 is a deficient number, since it is larger than the sum of its proper divisors (4803985).

20016475 is an equidigital number, since it uses as much as digits as its factorization.

20016475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800669 (or 800664 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20016475 is about 4473.9775368234. The cubic root of 20016475 is about 271.5162745869.

Adding to 20016475 its reverse (57461002), we get a palindrome (77477477).

The spelling of 20016475 in words is "twenty million, sixteen thousand, four hundred seventy-five".