20730371 has 4 divisors (see below), whose sum is σ = 20742792. Its totient is φ = 20717952.

The previous prime is 20730313. The next prime is 20730373. The reversal of 20730371 is 17303702.

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

It is a cyclic number.

It is not a de Polignac number, because 20730371 - 2²² = 16536067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20730373) 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, 3230 + ... + 7203.

It is an arithmetic number, because the mean of its divisors is an integer number (5185698).

Almost surely, 2^20730371 is an apocalyptic number.

20730371 is a deficient number, since it is larger than the sum of its proper divisors (12421).

20730371 is a wasteful number, since it uses less digits than its factorization.

20730371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12420.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 20730371 is about 4553.0617171306. The cubic root of 20730371 is about 274.7065564087.

The spelling of 20730371 in words is "twenty million, seven hundred thirty thousand, three hundred seventy-one".