20740933 has 4 divisors (see below), whose sum is σ = 20750080. Its totient is φ = 20731788.

The previous prime is 20740931. The next prime is 20740939. The reversal of 20740933 is 33904702.

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 20740933 - 2¹ = 20740931 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 (20740931) 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, 1666 + ... + 6652.

It is an arithmetic number, because the mean of its divisors is an integer number (5187520).

Almost surely, 2^20740933 is an apocalyptic number.

It is an amenable number.

20740933 is a deficient number, since it is larger than the sum of its proper divisors (9147).

20740933 is an equidigital number, since it uses as much as digits as its factorization.

20740933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9146.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20740933 is about 4554.2214482829. The cubic root of 20740933 is about 274.7532022700.

The spelling of 20740933 in words is "twenty million, seven hundred forty thousand, nine hundred thirty-three".