20556119 has 4 divisors (see below), whose sum is σ = 21638040. Its totient is φ = 19474200.

The previous prime is 20556113. The next prime is 20556121. The reversal of 20556119 is 91165502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20556119 is a prime.

It is a super-2 number, since 2×20556119² = 845108056684322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20556091 and 20556100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20556113) 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, 540932 + ... + 540969.

It is an arithmetic number, because the mean of its divisors is an integer number (5409510).

Almost surely, 2^20556119 is an apocalyptic number.

20556119 is a deficient number, since it is larger than the sum of its proper divisors (1081921).

20556119 is a wasteful number, since it uses less digits than its factorization.

20556119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081920.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 20556119 is about 4533.8856403752. The cubic root of 20556119 is about 273.9346950409.

The spelling of 20556119 in words is "twenty million, five hundred fifty-six thousand, one hundred nineteen".