19970933 has 4 divisors (see below), whose sum is σ = 19981728. Its totient is φ = 19960140.

The previous prime is 19970897. The next prime is 19970941. The reversal of 19970933 is 33907991.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 19970933 - 2⁸ = 19970677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19970953) 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, 1841 + ... + 6582.

It is an arithmetic number, because the mean of its divisors is an integer number (4995432).

Almost surely, 2^19970933 is an apocalyptic number.

It is an amenable number.

19970933 is a deficient number, since it is larger than the sum of its proper divisors (10795).

19970933 is an equidigital number, since it uses as much as digits as its factorization.

19970933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10794.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 19970933 is about 4468.8849839753. The cubic root of 19970933 is about 271.3101979414.

The spelling of 19970933 in words is "nineteen million, nine hundred seventy thousand, nine hundred thirty-three".