20733671 has 4 divisors (see below), whose sum is σ = 23695632. Its totient is φ = 17771712.

The previous prime is 20733641. The next prime is 20733677. The reversal of 20733671 is 17633702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20733671 - 2⁶ = 20733607 is a prime.

It is a super-2 number, since 2×20733671² = 859770226272482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20733677) 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, 1480970 + ... + 1480983.

It is an arithmetic number, because the mean of its divisors is an integer number (5923908).

Almost surely, 2^20733671 is an apocalyptic number.

20733671 is a deficient number, since it is larger than the sum of its proper divisors (2961961).

20733671 is an equidigital number, since it uses as much as digits as its factorization.

20733671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961960.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 20733671 is about 4553.4240962159. The cubic root of 20733671 is about 274.7211321816.

The spelling of 20733671 in words is "twenty million, seven hundred thirty-three thousand, six hundred seventy-one".