20522019 has 8 divisors (see below), whose sum is σ = 31271680. Its totient is φ = 11726856.

The previous prime is 20521987. The next prime is 20522023. The reversal of 20522019 is 91022502.

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

It is not a de Polignac number, because 20522019 - 2⁵ = 20521987 is a prime.

It is a super-2 number, since 2×20522019² = 842306527672722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 977239 = 20522019 / (2 + 0 + 5 + 2 + 2 + 0 + 1 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20521986 and 20522004.

It is not an unprimeable number, because it can be changed into a prime (20522039) 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, 488599 + ... + 488640.

It is an arithmetic number, because the mean of its divisors is an integer number (3908960).

Almost surely, 2^20522019 is an apocalyptic number.

20522019 is a deficient number, since it is larger than the sum of its proper divisors (10749661).

20522019 is an equidigital number, since it uses as much as digits as its factorization.

20522019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977249.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20522019 is about 4530.1235082501. The cubic root of 20522019 is about 273.7831368740.

The spelling of 20522019 in words is "twenty million, five hundred twenty-two thousand, nineteen".