19529965 has 16 divisors (see below), whose sum is σ = 28844928. Its totient is φ = 12361536.

The previous prime is 19529953. The next prime is 19529971. The reversal of 19529965 is 56992591.

It is a cyclic number.

It is not a de Polignac number, because 19529965 - 2⁷ = 19529837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21007 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (1802808).

Almost surely, 2^19529965 is an apocalyptic number.

It is an amenable number.

19529965 is a deficient number, since it is larger than the sum of its proper divisors (9314963).

19529965 is a wasteful number, since it uses less digits than its factorization.

19529965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42948.

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

The square root of 19529965 is about 4419.2719988704. The cubic root of 19529965 is about 269.2984301008.

It can be divided in two parts, 195299 and 65, that added together give a square (195364 = 442²).

The spelling of 19529965 in words is "nineteen million, five hundred twenty-nine thousand, nine hundred sixty-five".