19313964 has 30 divisors (see below), whose sum is σ = 50491364. Its totient is φ = 6437880.

The previous prime is 19313953. The next prime is 19313969. The reversal of 19313964 is 46931391.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19313969) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 29482 + ... + 30129.

Almost surely, 2^19313964 is an apocalyptic number.

It is an amenable number.

19313964 is an abundant number, since it is smaller than the sum of its proper divisors (31177400).

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

19313964 is a wasteful number, since it uses less digits than its factorization.

19313964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59627 (or 59616 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 19313964 is about 4394.7655227555. The cubic root of 19313964 is about 268.3019356376.

The spelling of 19313964 in words is "nineteen million, three hundred thirteen thousand, nine hundred sixty-four".