20860331 has 2 divisors, whose sum is σ = 20860332. Its totient is φ = 20860330.

The previous prime is 20860327. The next prime is 20860337. The reversal of 20860331 is 13306802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20860331 - 2² = 20860327 is a prime.

It is a super-2 number, since 2×20860331² = 870306818859122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20860297 and 20860306.

It is not a weakly prime, because it can be changed into another prime (20860337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10430165 + 10430166.

It is an arithmetic number, because the mean of its divisors is an integer number (10430166).

Almost surely, 2^20860331 is an apocalyptic number.

20860331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20860331 is an equidigital number, since it uses as much as digits as its factorization.

20860331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20860331 is about 4567.3111345736. The cubic root of 20860331 is about 275.2794118771.

The spelling of 20860331 in words is "twenty million, eight hundred sixty thousand, three hundred thirty-one".