19964530 has 8 divisors (see below), whose sum is σ = 35936172. Its totient is φ = 7985808.

The previous prime is 19964489. The next prime is 19964533. The reversal of 19964530 is 3546991.

It can be written as a sum of positive squares in 2 ways, for example, as 19900521 + 64009 = 4461^2 + 253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19964530.

It is not an unprimeable number, because it can be changed into a prime (19964533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998217 + ... + 998236.

Almost surely, 2^19964530 is an apocalyptic number.

19964530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19964530 is a deficient number, since it is larger than the sum of its proper divisors (15971642).

19964530 is a wasteful number, since it uses less digits than its factorization.

19964530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996460.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 19964530 is about 4468.1685286032. The cubic root of 19964530 is about 271.2811993815.

The spelling of 19964530 in words is "nineteen million, nine hundred sixty-four thousand, five hundred thirty".