19894056 has 64 divisors (see below), whose sum is σ = 61219200. Its totient is φ = 5246208.

The previous prime is 19894031. The next prime is 19894073. The reversal of 19894056 is 65049891.

It is a super-2 number, since 2×19894056² = 791546928262272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 19893999 and 19894017.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2371 + ... + 6738.

It is an arithmetic number, because the mean of its divisors is an integer number (956550).

Almost surely, 2^19894056 is an apocalyptic number.

It is an amenable number.

19894056 is an abundant number, since it is smaller than the sum of its proper divisors (41325144).

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

19894056 is a wasteful number, since it uses less digits than its factorization.

19894056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138 (or 9134 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 19894056 is about 4460.2753278245. The cubic root of 19894056 is about 270.9616190885.

The spelling of 19894056 in words is "nineteen million, eight hundred ninety-four thousand, fifty-six".