20386057 has 4 divisors (see below), whose sum is σ = 20521216. Its totient is φ = 20250900.

The previous prime is 20386049. The next prime is 20386063. The reversal of 20386057 is 75068302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20386057 - 2³ = 20386049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20386357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67353 + ... + 67654.

It is an arithmetic number, because the mean of its divisors is an integer number (5130304).

Almost surely, 2^20386057 is an apocalyptic number.

It is an amenable number.

20386057 is a deficient number, since it is larger than the sum of its proper divisors (135159).

20386057 is a wasteful number, since it uses less digits than its factorization.

20386057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135158.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20386057 is about 4515.0921363799. The cubic root of 20386057 is about 273.1771761547.

The spelling of 20386057 in words is "twenty million, three hundred eighty-six thousand, fifty-seven".