19894956 has 24 divisors (see below), whose sum is σ = 46495680. Its totient is φ = 6621072.

The previous prime is 19894943. The next prime is 19894969. The reversal of 19894956 is 65949891.

It is an interprime number because it is at equal distance from previous prime (19894943) and next prime (19894969).

It is a junction number, because it is equal to n+sod(n) for n = 19894899 and 19894908.

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 7 ways as a sum of consecutive naturals, for example, 11415 + ... + 13041.

It is an arithmetic number, because the mean of its divisors is an integer number (1937320).

Almost surely, 2^19894956 is an apocalyptic number.

It is an amenable number.

19894956 is an abundant number, since it is smaller than the sum of its proper divisors (26600724).

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

19894956 is a wasteful number, since it uses less digits than its factorization.

19894956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653 (or 2651 counting only the distinct ones).

The product of its digits is 699840, while the sum is 51.

The square root of 19894956 is about 4460.3762173162. The cubic root of 19894956 is about 270.9657050959.

The spelling of 19894956 in words is "nineteen million, eight hundred ninety-four thousand, nine hundred fifty-six".