20860402 has 16 divisors (see below), whose sum is σ = 32757120. Its totient is φ = 9944352.

The previous prime is 20860397. The next prime is 20860403. The reversal of 20860402 is 20406802.

It is not an unprimeable number, because it can be changed into a prime (20860403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19678 + ... + 20710.

It is an arithmetic number, because the mean of its divisors is an integer number (2047320).

Almost surely, 2^20860402 is an apocalyptic number.

20860402 is a deficient number, since it is larger than the sum of its proper divisors (11896718).

20860402 is a wasteful number, since it uses less digits than its factorization.

20860402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20860402 is about 4567.3189071927. The cubic root of 20860402 is about 275.2797241894.

The spelling of 20860402 in words is "twenty million, eight hundred sixty thousand, four hundred two".