19307964 has 48 divisors (see below), whose sum is σ = 49337120. Its totient is φ = 5840640.

The previous prime is 19307963. The next prime is 19307983. The reversal of 19307964 is 46970391.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19307963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8502 + ... + 10530.

Almost surely, 2^19307964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19307964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24668560).

19307964 is an abundant number, since it is smaller than the sum of its proper divisors (30029156).

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

19307964 is a wasteful number, since it uses less digits than its factorization.

19307964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 19307964 is about 4394.0828394558. The cubic root of 19307964 is about 268.2741495525.

The spelling of 19307964 in words is "nineteen million, three hundred seven thousand, nine hundred sixty-four".