20557195 has 8 divisors (see below), whose sum is σ = 25270560. Its totient is φ = 16044480.

The previous prime is 20557181. The next prime is 20557211. The reversal of 20557195 is 59175502.

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

It is not a de Polignac number, because 20557195 - 2⁷ = 20557067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20557195.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49935 + ... + 50344.

It is an arithmetic number, because the mean of its divisors is an integer number (3158820).

Almost surely, 2^20557195 is an apocalyptic number.

20557195 is a deficient number, since it is larger than the sum of its proper divisors (4713365).

20557195 is a wasteful number, since it uses less digits than its factorization.

20557195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100325.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 20557195 is about 4534.0043008361. The cubic root of 20557195 is about 273.9394746167.

The spelling of 20557195 in words is "twenty million, five hundred fifty-seven thousand, one hundred ninety-five".