20499846 has 8 divisors (see below), whose sum is σ = 40999704. Its totient is φ = 6833280.

The previous prime is 20499833. The next prime is 20499847. The reversal of 20499846 is 64899402.

It is a sphenic number, since it is the product of 3 distinct primes.

20499846 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20499798 and 20499807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20499847) 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, 1708315 + ... + 1708326.

It is an arithmetic number, because the mean of its divisors is an integer number (5124963).

Almost surely, 2^20499846 is an apocalyptic number.

20499846 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20499846 is a wasteful number, since it uses less digits than its factorization.

20499846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416646.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 20499846 is about 4527.6755625818. The cubic root of 20499846 is about 273.6844984127.

The spelling of 20499846 in words is "twenty million, four hundred ninety-nine thousand, eight hundred forty-six".