20077557 has 8 divisors (see below), whose sum is σ = 26981376. Its totient is φ = 13279392.

The previous prime is 20077543. The next prime is 20077567. The reversal of 20077557 is 75577002.

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

It is not a de Polignac number, because 20077557 - 2¹¹ = 20075509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077537) 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, 25968 + ... + 26729.

It is an arithmetic number, because the mean of its divisors is an integer number (3372672).

Almost surely, 2^20077557 is an apocalyptic number.

It is an amenable number.

20077557 is a deficient number, since it is larger than the sum of its proper divisors (6903819).

20077557 is a wasteful number, since it uses less digits than its factorization.

20077557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52827.

The product of its (nonzero) digits is 17150, while the sum is 33.

The square root of 20077557 is about 4480.7987011246. The cubic root of 20077557 is about 271.7921792386.

The spelling of 20077557 in words is "twenty million, seventy-seven thousand, five hundred fifty-seven".