19958225 has 24 divisors (see below), whose sum is σ = 28777920. Its totient is φ = 13446720.

The previous prime is 19958219. The next prime is 19958231. The reversal of 19958225 is 52285991.

It is an interprime number because it is at equal distance from previous prime (19958219) and next prime (19958231).

It is not a de Polignac number, because 19958225 - 2⁸ = 19957969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9359 + ... + 11291.

It is an arithmetic number, because the mean of its divisors is an integer number (1199080).

Almost surely, 2^19958225 is an apocalyptic number.

It is an amenable number.

19958225 is a deficient number, since it is larger than the sum of its proper divisors (8819695).

19958225 is a wasteful number, since it uses less digits than its factorization.

19958225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 2004 counting only the distinct ones).

The product of its digits is 64800, while the sum is 41.

The square root of 19958225 is about 4467.4629265390. The cubic root of 19958225 is about 271.2526385948.

The spelling of 19958225 in words is "nineteen million, nine hundred fifty-eight thousand, two hundred twenty-five".