20863465 has 48 divisors (see below), whose sum is σ = 31256064. Its totient is φ = 13305600.

The previous prime is 20863459. The next prime is 20863487. The reversal of 20863465 is 56436802.

It is a happy number.

It is not a de Polignac number, because 20863465 - 2³ = 20863457 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20863465.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 311362 + ... + 311428.

It is an arithmetic number, because the mean of its divisors is an integer number (651168).

Almost surely, 2^20863465 is an apocalyptic number.

It is an amenable number.

20863465 is a deficient number, since it is larger than the sum of its proper divisors (10392599).

20863465 is a wasteful number, since it uses less digits than its factorization.

20863465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 20863465 is about 4567.6542119561. The cubic root of 20863465 is about 275.2931969328.

The spelling of 20863465 in words is "twenty million, eight hundred sixty-three thousand, four hundred sixty-five".