20455994 has 12 divisors (see below), whose sum is σ = 33081594. Its totient is φ = 9430584.

The previous prime is 20455979. The next prime is 20456041. The reversal of 20455994 is 49955402.

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 786769 = 4435^2 + 887^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22619 + ... + 23505.

Almost surely, 2^20455994 is an apocalyptic number.

20455994 is a deficient number, since it is larger than the sum of its proper divisors (12625600).

20455994 is an frugal number, since it uses more digits than its factorization.

20455994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 20455994 is about 4522.8303085568. The cubic root of 20455994 is about 273.4892094577.

The spelling of 20455994 in words is "twenty million, four hundred fifty-five thousand, nine hundred ninety-four".