19868025 has 24 divisors (see below), whose sum is σ = 33199264. Its totient is φ = 10483200.

The previous prime is 19868003. The next prime is 19868027. The reversal of 19868025 is 52086891.

It is not a de Polignac number, because 19868025 - 2⁸ = 19867769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19868027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5910 + ... + 8640.

Almost surely, 2^19868025 is an apocalyptic number.

19868025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19868025 is a deficient number, since it is larger than the sum of its proper divisors (13331239).

19868025 is a wasteful number, since it uses less digits than its factorization.

19868025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841 (or 2836 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 19868025 is about 4457.3562792310. The cubic root of 19868025 is about 270.8433847683.

It can be divided in two parts, 1986 and 8025, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 19868025 in words is "nineteen million, eight hundred sixty-eight thousand, twenty-five".