19964955 has 8 divisors (see below), whose sum is σ = 31943952. Its totient is φ = 10647968.

The previous prime is 19964947. The next prime is 19964969. The reversal of 19964955 is 55946991.

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

It is a cyclic number.

It is not a de Polignac number, because 19964955 - 2³ = 19964947 is a prime.

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, 665484 + ... + 665513.

It is an arithmetic number, because the mean of its divisors is an integer number (3992994).

Almost surely, 2^19964955 is an apocalyptic number.

19964955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19964955 is a deficient number, since it is larger than the sum of its proper divisors (11978997).

19964955 is a wasteful number, since it uses less digits than its factorization.

19964955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331005.

The product of its digits is 437400, while the sum is 48.

The square root of 19964955 is about 4468.2160869859. The cubic root of 19964955 is about 271.2831243570.

The spelling of 19964955 in words is "nineteen million, nine hundred sixty-four thousand, nine hundred fifty-five".