19969725 has 24 divisors (see below), whose sum is σ = 33256800. Its totient is φ = 10573120.

The previous prime is 19969723. The next prime is 19969769. The reversal of 19969725 is 52796991.

It is not a de Polignac number, because 19969725 - 2¹ = 19969723 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19969723) 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, 10282 + ... + 12068.

It is an arithmetic number, because the mean of its divisors is an integer number (1385700).

Almost surely, 2^19969725 is an apocalyptic number.

19969725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19969725 is a deficient number, since it is larger than the sum of its proper divisors (13287075).

19969725 is a wasteful number, since it uses less digits than its factorization.

19969725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1944 counting only the distinct ones).

The product of its digits is 306180, while the sum is 48.

The square root of 19969725 is about 4468.7498251748. The cubic root of 19969725 is about 271.3047275022.

The spelling of 19969725 in words is "nineteen million, nine hundred sixty-nine thousand, seven hundred twenty-five".