20837994 has 8 divisors (see below), whose sum is σ = 41676000. Its totient is φ = 6945996.

The previous prime is 20837981. The next prime is 20838011. The reversal of 20837994 is 49973802.

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

20837994 is an admirable number.

It is a Curzon 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, 1736494 + ... + 1736505.

It is an arithmetic number, because the mean of its divisors is an integer number (5209500).

Almost surely, 2^20837994 is an apocalyptic number.

20837994 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.

20837994 is a wasteful number, since it uses less digits than its factorization.

20837994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3473004.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 20837994 is about 4564.8651677788. The cubic root of 20837994 is about 275.1811214543.

The spelling of 20837994 in words is "twenty million, eight hundred thirty-seven thousand, nine hundred ninety-four".