20095557 has 8 divisors (see below), whose sum is σ = 26822784. Its totient is φ = 13382688.

The previous prime is 20095553. The next prime is 20095561. The reversal of 20095557 is 75559002.

It is an interprime number because it is at equal distance from previous prime (20095553) and next prime (20095561).

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

It is not a de Polignac number, because 20095557 - 2² = 20095553 is a prime.

It is a super-2 number, since 2×20095557² = 807662822280498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20095553) 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, 273 + ... + 6345.

It is an arithmetic number, because the mean of its divisors is an integer number (3352848).

Almost surely, 2^20095557 is an apocalyptic number.

It is an amenable number.

20095557 is a deficient number, since it is larger than the sum of its proper divisors (6727227).

20095557 is a wasteful number, since it uses less digits than its factorization.

20095557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179.

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 20095557 is about 4482.8068216241. The cubic root of 20095557 is about 271.8733776624.

The spelling of 20095557 in words is "twenty million, ninety-five thousand, five hundred fifty-seven".