20219056 has 40 divisors (see below), whose sum is σ = 46028304. Its totient is φ = 8482560.

The previous prime is 20219033. The next prime is 20219077. The reversal of 20219056 is 65091202.

It is a super-2 number, since 2×20219056² = 817620451062272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20219056.

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, 2131 + ... + 6706.

Almost surely, 2^20219056 is an apocalyptic number.

20219056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20219056 is an abundant number, since it is smaller than the sum of its proper divisors (25809248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20219056 is a wasteful number, since it uses less digits than its factorization.

20219056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8869 (or 8863 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 20219056 is about 4496.5604632875. The cubic root of 20219056 is about 272.4291811591.

The spelling of 20219056 in words is "twenty million, two hundred nineteen thousand, fifty-six".