20771001 has 12 divisors (see below), whose sum is σ = 31307328. Its totient is φ = 13245144.

The previous prime is 20770973. The next prime is 20771029. The reversal of 20771001 is 10017702.

It is an interprime number because it is at equal distance from previous prime (20770973) and next prime (20771029).

It is not a de Polignac number, because 20771001 - 2⁹ = 20770489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20771041) 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, 49965 + ... + 50378.

It is an arithmetic number, because the mean of its divisors is an integer number (2608944).

Almost surely, 2^20771001 is an apocalyptic number.

It is an amenable number.

20771001 is a deficient number, since it is larger than the sum of its proper divisors (10536327).

20771001 is a wasteful number, since it uses less digits than its factorization.

20771001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100372 (or 100369 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 20771001 is about 4557.5213658303. The cubic root of 20771001 is about 274.8859074926.

Adding to 20771001 its reverse (10017702), we get a palindrome (30788703).

The spelling of 20771001 in words is "twenty million, seven hundred seventy-one thousand, one".