20577701 has 8 divisors (see below), whose sum is σ = 21850200. Its totient is φ = 19312128.

The previous prime is 20577691. The next prime is 20577721. The reversal of 20577701 is 10777502.

It can be written as a sum of positive squares in 4 ways, for example, as 3147076 + 17430625 = 1774^2 + 4175^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20577701 - 2⁶ = 20577637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577721) 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, 5225 + ... + 8273.

It is an arithmetic number, because the mean of its divisors is an integer number (2731275).

Almost surely, 2^20577701 is an apocalyptic number.

It is an amenable number.

20577701 is a deficient number, since it is larger than the sum of its proper divisors (1272499).

20577701 is a wasteful number, since it uses less digits than its factorization.

20577701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463.

The product of its (nonzero) digits is 3430, while the sum is 29.

The square root of 20577701 is about 4536.2650936646. The cubic root of 20577701 is about 274.0305301019.

The spelling of 20577701 in words is "twenty million, five hundred seventy-seven thousand, seven hundred one".