20854408 has 16 divisors (see below), whose sum is σ = 39214080. Its totient is φ = 10397328.

The previous prime is 20854397. The next prime is 20854409. The reversal of 20854408 is 80445802.

It is a self number, because there is not a number n which added to its sum of digits gives 20854408.

It is not an unprimeable number, because it can be changed into a prime (20854409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616 + ... + 6487.

It is an arithmetic number, because the mean of its divisors is an integer number (2450880).

Almost surely, 2^20854408 is an apocalyptic number.

It is an amenable number.

20854408 is a deficient number, since it is larger than the sum of its proper divisors (18359672).

20854408 is a wasteful number, since it uses less digits than its factorization.

20854408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7476 (or 7472 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 20854408 is about 4566.6626763973. The cubic root of 20854408 is about 275.2533554945.

The spelling of 20854408 in words is "twenty million, eight hundred fifty-four thousand, four hundred eight".