19940965 has 32 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 13708800.

The previous prime is 19940957. The next prime is 19940971. The reversal of 19940965 is 56904991.

It is not a de Polignac number, because 19940965 - 2³ = 19940957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83316 + ... + 83554.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^19940965 is an apocalyptic number.

It is an amenable number.

19940965 is a deficient number, since it is larger than the sum of its proper divisors (7637915).

19940965 is a wasteful number, since it uses less digits than its factorization.

19940965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 19940965 is about 4465.5307635263. The cubic root of 19940965 is about 271.1744223738.

The spelling of 19940965 in words is "nineteen million, nine hundred forty thousand, nine hundred sixty-five".