20470771 has 8 divisors (see below), whose sum is σ = 22816080. Its totient is φ = 18252288.

The previous prime is 20470763. The next prime is 20470777. The reversal of 20470771 is 17707402.

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

It is not a de Polignac number, because 20470771 - 2³ = 20470763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20470777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31366 + ... + 32011.

It is an arithmetic number, because the mean of its divisors is an integer number (2852010).

Almost surely, 2^20470771 is an apocalyptic number.

20470771 is a deficient number, since it is larger than the sum of its proper divisors (2345309).

20470771 is a wasteful number, since it uses less digits than its factorization.

20470771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63413.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 20470771 is about 4524.4636146178. The cubic root of 20470771 is about 273.5550479809. Note that the first 3 decimals are identical.

The spelling of 20470771 in words is "twenty million, four hundred seventy thousand, seven hundred seventy-one".