20771601 has 8 divisors (see below), whose sum is σ = 28218240. Its totient is φ = 13586352.

The previous prime is 20771593. The next prime is 20771629. The reversal of 20771601 is 10617702.

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

It is not a de Polignac number, because 20771601 - 2³ = 20771593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20771651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65161 + ... + 65478.

It is an arithmetic number, because the mean of its divisors is an integer number (3527280).

Almost surely, 2^20771601 is an apocalyptic number.

It is an amenable number.

20771601 is a deficient number, since it is larger than the sum of its proper divisors (7446639).

20771601 is a wasteful number, since it uses less digits than its factorization.

20771601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130695.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 20771601 is about 4557.5871906086. The cubic root of 20771601 is about 274.8885542910. Note that the first 3 decimals are identical.

The spelling of 20771601 in words is "twenty million, seven hundred seventy-one thousand, six hundred one".