20733407 has 4 divisors (see below), whose sum is σ = 20743800. Its totient is φ = 20723016.

The previous prime is 20733359. The next prime is 20733467. The reversal of 20733407 is 70433702.

It is a semiprime because it is the product of two primes, 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 20733407 - 2¹⁴ = 20717023 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 (20733467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157 + ... + 6542.

It is an arithmetic number, because the mean of its divisors is an integer number (5185950).

Almost surely, 2^20733407 is an apocalyptic number.

20733407 is a deficient number, since it is larger than the sum of its proper divisors (10393).

20733407 is an equidigital number, since it uses as much as digits as its factorization.

20733407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 20733407 is about 4553.3951069504. The cubic root of 20733407 is about 274.7199661767.

The spelling of 20733407 in words is "twenty million, seven hundred thirty-three thousand, four hundred seven".