20501994 has 8 divisors (see below), whose sum is σ = 41004000. Its totient is φ = 6833996.

The previous prime is 20501989. The next prime is 20502019. The reversal of 20501994 is 49910502.

It is a happy number.

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

20501994 is an admirable 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, 1708494 + ... + 1708505.

It is an arithmetic number, because the mean of its divisors is an integer number (5125500).

Almost surely, 2^20501994 is an apocalyptic number.

20501994 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.

20501994 is a wasteful number, since it uses less digits than its factorization.

20501994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417004.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 20501994 is about 4527.9127641773. The cubic root of 20501994 is about 273.6940570824.

The spelling of 20501994 in words is "twenty million, five hundred one thousand, nine hundred ninety-four".