20162947 has 4 divisors (see below), whose sum is σ = 23043376. Its totient is φ = 17282520.

The previous prime is 20162921. The next prime is 20162951. The reversal of 20162947 is 74926102.

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

It is a cyclic number.

It is not a de Polignac number, because 20162947 - 2¹⁵ = 20130179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20162957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440204 + ... + 1440217.

It is an arithmetic number, because the mean of its divisors is an integer number (5760844).

Almost surely, 2^20162947 is an apocalyptic number.

20162947 is a deficient number, since it is larger than the sum of its proper divisors (2880429).

20162947 is an equidigital number, since it uses as much as digits as its factorization.

20162947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880428.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20162947 is about 4490.3170266697. The cubic root of 20162947 is about 272.1769456715.

The spelling of 20162947 in words is "twenty million, one hundred sixty-two thousand, nine hundred forty-seven".