20476945 has 8 divisors (see below), whose sum is σ = 24620544. Its totient is φ = 16349424.

The previous prime is 20476933. The next prime is 20477053. The reversal of 20476945 is 54967402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20476945 - 2¹¹ = 20474897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009 + ... + 6478.

It is an arithmetic number, because the mean of its divisors is an integer number (3077568).

Almost surely, 2^20476945 is an apocalyptic number.

It is an amenable number.

20476945 is a deficient number, since it is larger than the sum of its proper divisors (4143599).

20476945 is an equidigital number, since it uses as much as digits as its factorization.

20476945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20476945 is about 4525.1458540029. The cubic root of 20476945 is about 273.5825466863.

The spelling of 20476945 in words is "twenty million, four hundred seventy-six thousand, nine hundred forty-five".