20272351 has 4 divisors (see below), whose sum is σ = 22115304. Its totient is φ = 18429400.

The previous prime is 20272339. The next prime is 20272379. The reversal of 20272351 is 15327202.

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

It is not a de Polignac number, because 20272351 - 2¹¹ = 20270303 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 (20272051) 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, 921460 + ... + 921481.

It is an arithmetic number, because the mean of its divisors is an integer number (5528826).

Almost surely, 2^20272351 is an apocalyptic number.

20272351 is a deficient number, since it is larger than the sum of its proper divisors (1842953).

20272351 is a wasteful number, since it uses less digits than its factorization.

20272351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842952.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20272351 is about 4502.4827595450. The cubic root of 20272351 is about 272.6683346748.

Adding to 20272351 its reverse (15327202), we get a palindrome (35599553).

The spelling of 20272351 in words is "twenty million, two hundred seventy-two thousand, three hundred fifty-one".