20853396 has 48 divisors (see below), whose sum is σ = 54331200. Its totient is φ = 6916896.

The previous prime is 20853389. The next prime is 20853401. The reversal of 20853396 is 69335802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20853396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31315 + ... + 31973.

It is an arithmetic number, because the mean of its divisors is an integer number (1131900).

Almost surely, 2^20853396 is an apocalyptic number.

It is an amenable number.

20853396 is an abundant number, since it is smaller than the sum of its proper divisors (33477804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20853396 is a wasteful number, since it uses less digits than its factorization.

20853396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 20853396 is about 4566.5518720365. The cubic root of 20853396 is about 275.2489030241.

The spelling of 20853396 in words is "twenty million, eight hundred fifty-three thousand, three hundred ninety-six".