20727371 has 4 divisors (see below), whose sum is σ = 23688432. Its totient is φ = 17766312.

The previous prime is 20727361. The next prime is 20727379. The reversal of 20727371 is 17372702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20727371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20727379) 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, 1480520 + ... + 1480533.

It is an arithmetic number, because the mean of its divisors is an integer number (5922108).

Almost surely, 2^20727371 is an apocalyptic number.

20727371 is a deficient number, since it is larger than the sum of its proper divisors (2961061).

20727371 is an equidigital number, since it uses as much as digits as its factorization.

20727371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961060.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 20727371 is about 4552.7322565686. The cubic root of 20727371 is about 274.6933043637.

The spelling of 20727371 in words is "twenty million, seven hundred twenty-seven thousand, three hundred seventy-one".