19925965 has 16 divisors (see below), whose sum is σ = 25369920. Its totient is φ = 14981760.

The previous prime is 19925953. The next prime is 19925993. The reversal of 19925965 is 56952991.

It is not a de Polignac number, because 19925965 - 2¹³ = 19917773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12250 + ... + 13780.

It is an arithmetic number, because the mean of its divisors is an integer number (1585620).

Almost surely, 2^19925965 is an apocalyptic number.

It is an amenable number.

19925965 is a deficient number, since it is larger than the sum of its proper divisors (5443955).

19925965 is a wasteful number, since it uses less digits than its factorization.

19925965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692.

The product of its digits is 218700, while the sum is 46.

The square root of 19925965 is about 4463.8509159693. The cubic root of 19925965 is about 271.1064110100.

The spelling of 19925965 in words is "nineteen million, nine hundred twenty-five thousand, nine hundred sixty-five".