20011933 has 4 divisors (see below), whose sum is σ = 20088288. Its totient is φ = 19935580.

The previous prime is 20011919. The next prime is 20011951. The reversal of 20011933 is 33911002.

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 20011933 - 2²¹ = 17914781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20011933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011913) 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, 37783 + ... + 38308.

It is an arithmetic number, because the mean of its divisors is an integer number (5022072).

Almost surely, 2^20011933 is an apocalyptic number.

It is an amenable number.

20011933 is a deficient number, since it is larger than the sum of its proper divisors (76355).

20011933 is an equidigital number, since it uses as much as digits as its factorization.

20011933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76354.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 20011933 is about 4473.4699060126. The cubic root of 20011933 is about 271.4957361686.

Adding to 20011933 its reverse (33911002), we get a palindrome (53922935).

The spelling of 20011933 in words is "twenty million, eleven thousand, nine hundred thirty-three".