20280371 has 8 divisors (see below), whose sum is σ = 21523824. Its totient is φ = 19042560.

The previous prime is 20280361. The next prime is 20280373. The reversal of 20280371 is 17308202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20280371 - 2⁶ = 20280307 is a prime.

It is a super-2 number, since 2×20280371² = 822586895795282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20280373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7751 + ... + 10031.

It is an arithmetic number, because the mean of its divisors is an integer number (2690478).

Almost surely, 2^20280371 is an apocalyptic number.

20280371 is a deficient number, since it is larger than the sum of its proper divisors (1243453).

20280371 is a wasteful number, since it uses less digits than its factorization.

20280371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20280371 is about 4503.3732912118. The cubic root of 20280371 is about 272.7042869550.

Adding to 20280371 its reverse (17308202), we get a palindrome (37588573).

The spelling of 20280371 in words is "twenty million, two hundred eighty thousand, three hundred seventy-one".