20470311 has 6 divisors (see below), whose sum is σ = 29568240. Its totient is φ = 13646868.

The previous prime is 20470297. The next prime is 20470321. The reversal of 20470311 is 11307402.

It is not a de Polignac number, because 20470311 - 2⁷ = 20470183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20470321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1137231 + ... + 1137248.

It is an arithmetic number, because the mean of its divisors is an integer number (4928040).

Almost surely, 2^20470311 is an apocalyptic number.

20470311 is a deficient number, since it is larger than the sum of its proper divisors (9097929).

20470311 is a wasteful number, since it uses less digits than its factorization.

20470311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274485 (or 2274482 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20470311 is about 4524.4127795770. The cubic root of 20470311 is about 273.5529989412.

Adding to 20470311 its reverse (11307402), we get a palindrome (31777713).

The spelling of 20470311 in words is "twenty million, four hundred seventy thousand, three hundred eleven".