20860427 has 18 divisors (see below), whose sum is σ = 25130844. Its totient is φ = 17264520.

The previous prime is 20860409. The next prime is 20860451. The reversal of 20860427 is 72406802.

It is not a de Polignac number, because 20860427 - 2⁶ = 20860363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20860427.

It is not an unprimeable number, because it can be changed into a prime (20860457) 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 17 ways as a sum of consecutive naturals, for example, 46868 + ... + 47310.

It is an arithmetic number, because the mean of its divisors is an integer number (1396158).

Almost surely, 2^20860427 is an apocalyptic number.

20860427 is a deficient number, since it is larger than the sum of its proper divisors (4270417).

20860427 is an equidigital number, since it uses as much as digits as its factorization.

20860427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20860427 is about 4567.3216440273. The cubic root of 20860427 is about 275.2798341584.

The spelling of 20860427 in words is "twenty million, eight hundred sixty thousand, four hundred twenty-seven".