20913846 has 8 divisors (see below), whose sum is σ = 41827704. Its totient is φ = 6971280.

The previous prime is 20913839. The next prime is 20913857. The reversal of 20913846 is 64831902.

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

20913846 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742815 + ... + 1742826.

It is an arithmetic number, because the mean of its divisors is an integer number (5228463).

Almost surely, 2^20913846 is an apocalyptic number.

20913846 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.

20913846 is a wasteful number, since it uses less digits than its factorization.

20913846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485646.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20913846 is about 4573.1658618511. The cubic root of 20913846 is about 275.5146110566.

The spelling of 20913846 in words is "twenty million, nine hundred thirteen thousand, eight hundred forty-six".