20475081 has 12 divisors (see below), whose sum is σ = 32263920. Its totient is φ = 12409080.

The previous prime is 20475079. The next prime is 20475101. The reversal of 20475081 is 18057402.

It is not a de Polignac number, because 20475081 - 2¹ = 20475079 is a prime.

It is a super-2 number, since 2×20475081² = 838457883913122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20475001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103311 + ... + 103508.

It is an arithmetic number, because the mean of its divisors is an integer number (2688660).

Almost surely, 2^20475081 is an apocalyptic number.

It is an amenable number.

20475081 is a deficient number, since it is larger than the sum of its proper divisors (11788839).

20475081 is a wasteful number, since it uses less digits than its factorization.

20475081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206836 (or 206833 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20475081 is about 4524.9398891035. The cubic root of 20475081 is about 273.5742451006.

The spelling of 20475081 in words is "twenty million, four hundred seventy-five thousand, eighty-one".