20475051 has 16 divisors (see below), whose sum is σ = 27998208. Its totient is φ = 13305600.

The previous prime is 20475047. The next prime is 20475071. The reversal of 20475051 is 15057402.

It is not a de Polignac number, because 20475051 - 2² = 20475047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20475001) 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 in 15 ways as a sum of consecutive naturals, for example, 20166 + ... + 21156.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^20475051 is an apocalyptic number.

20475051 is a deficient number, since it is larger than the sum of its proper divisors (7523157).

20475051 is an equidigital number, since it uses as much as digits as its factorization.

20475051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20475051 is about 4524.9365741411. The cubic root of 20475051 is about 273.5741114872.

The spelling of 20475051 in words is "twenty million, four hundred seventy-five thousand, fifty-one".