20547057 has 8 divisors (see below), whose sum is σ = 27845440. Its totient is φ = 13473360.

The previous prime is 20547053. The next prime is 20547083. The reversal of 20547057 is 75074502.

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

It is not a de Polignac number, because 20547057 - 2² = 20547053 is a prime.

It is a super-2 number, since 2×20547057² = 844363102722498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20547053) 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, 55957 + ... + 56322.

It is an arithmetic number, because the mean of its divisors is an integer number (3480680).

Almost surely, 2^20547057 is an apocalyptic number.

It is an amenable number.

20547057 is a deficient number, since it is larger than the sum of its proper divisors (7298383).

20547057 is a wasteful number, since it uses less digits than its factorization.

20547057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112343.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 20547057 is about 4532.8861666713. The cubic root of 20547057 is about 273.8944351540.

The spelling of 20547057 in words is "twenty million, five hundred forty-seven thousand, fifty-seven".