20554919 has 8 divisors (see below), whose sum is σ = 25627008. Its totient is φ = 16016760.

The previous prime is 20554907. The next prime is 20554949. The reversal of 20554919 is 91945502.

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

It is a cyclic number.

It is not a de Polignac number, because 20554919 - 2¹⁶ = 20489383 is a prime.

It is a super-2 number, since 2×20554919² = 845009390193122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133397 + ... + 133550.

It is an arithmetic number, because the mean of its divisors is an integer number (3203376).

Almost surely, 2^20554919 is an apocalyptic number.

20554919 is a deficient number, since it is larger than the sum of its proper divisors (5072089).

20554919 is a wasteful number, since it uses less digits than its factorization.

20554919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266965.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 20554919 is about 4533.7533016255. The cubic root of 20554919 is about 273.9293644622.

The spelling of 20554919 in words is "twenty million, five hundred fifty-four thousand, nine hundred nineteen".