20601577 has 8 divisors (see below), whose sum is σ = 21669120. Its totient is φ = 19559280.

The previous prime is 20601547. The next prime is 20601593. The reversal of 20601577 is 77510602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20601577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20601517) 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, 4627 + ... + 7912.

It is an arithmetic number, because the mean of its divisors is an integer number (2708640).

Almost surely, 2^20601577 is an apocalyptic number.

It is an amenable number.

20601577 is a deficient number, since it is larger than the sum of its proper divisors (1067543).

20601577 is a wasteful number, since it uses less digits than its factorization.

20601577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12623.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 20601577 is about 4538.8960111463. The cubic root of 20601577 is about 274.1364736519.

The spelling of 20601577 in words is "twenty million, six hundred one thousand, five hundred seventy-seven".