19983525 has 12 divisors (see below), whose sum is σ = 33039552. Its totient is φ = 10657840.

The previous prime is 19983521. The next prime is 19983541. The reversal of 19983525 is 52538991.

It is not a de Polignac number, because 19983525 - 2² = 19983521 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19983521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133149 + ... + 133298.

It is an arithmetic number, because the mean of its divisors is an integer number (2753296).

Almost surely, 2^19983525 is an apocalyptic number.

19983525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19983525 is a deficient number, since it is larger than the sum of its proper divisors (13056027).

19983525 is a wasteful number, since it uses less digits than its factorization.

19983525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266460 (or 266455 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 19983525 is about 4470.2936145180. The cubic root of 19983525 is about 271.3672078008.

The spelling of 19983525 in words is "nineteen million, nine hundred eighty-three thousand, five hundred twenty-five".