19933961 has 4 divisors (see below), whose sum is σ = 20577024. Its totient is φ = 19290900.

The previous prime is 19933957. The next prime is 19933973. The reversal of 19933961 is 16933991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19933961 - 2² = 19933957 is a prime.

It is a super-2 number, since 2×19933961² = 794725602299042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19933931) 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, 321485 + ... + 321546.

It is an arithmetic number, because the mean of its divisors is an integer number (5144256).

Almost surely, 2^19933961 is an apocalyptic number.

It is an amenable number.

19933961 is a deficient number, since it is larger than the sum of its proper divisors (643063).

19933961 is an equidigital number, since it uses as much as digits as its factorization.

19933961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643062.

The product of its digits is 39366, while the sum is 41.

The square root of 19933961 is about 4464.7464653662. The cubic root of 19933961 is about 271.1426698472.

The spelling of 19933961 in words is "nineteen million, nine hundred thirty-three thousand, nine hundred sixty-one".