20049057 has 24 divisors (see below), whose sum is σ = 33324096. Its totient is φ = 11378016.

The previous prime is 20049049. The next prime is 20049067. The reversal of 20049057 is 75094002.

It is not a de Polignac number, because 20049057 - 2³ = 20049049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20049057.

It is not an unprimeable number, because it can be changed into a prime (20049067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8878 + ... + 10904.

It is an arithmetic number, because the mean of its divisors is an integer number (1388504).

Almost surely, 2^20049057 is an apocalyptic number.

It is an amenable number.

20049057 is a deficient number, since it is larger than the sum of its proper divisors (13275039).

20049057 is a wasteful number, since it uses less digits than its factorization.

20049057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20049057 is about 4477.6173351460. The cubic root of 20049057 is about 271.6635157567.

The spelling of 20049057 in words is "twenty million, forty-nine thousand, fifty-seven".