19690464 has 48 divisors (see below), whose sum is σ = 51916032. Its totient is φ = 6534528.

The previous prime is 19690459. The next prime is 19690477. The reversal of 19690464 is 46409691.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42297 + ... + 42759.

It is an arithmetic number, because the mean of its divisors is an integer number (1081584).

Almost surely, 2^19690464 is an apocalyptic number.

It is an amenable number.

19690464 is an abundant number, since it is smaller than the sum of its proper divisors (32225568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19690464 is a wasteful number, since it uses less digits than its factorization.

19690464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 19690464 is about 4437.3938297158. The cubic root of 19690464 is about 270.0341246306.

The spelling of 19690464 in words is "nineteen million, six hundred ninety thousand, four hundred sixty-four".