20900454 has 8 divisors (see below), whose sum is σ = 41800920. Its totient is φ = 6966816.

The previous prime is 20900443. The next prime is 20900459. The reversal of 20900454 is 45400902.

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

20900454 is an admirable number.

It is a super-2 number, since 2×20900454² = 873657954812232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20900459) 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, 1741699 + ... + 1741710.

It is an arithmetic number, because the mean of its divisors is an integer number (5225115).

Almost surely, 2^20900454 is an apocalyptic number.

20900454 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.

20900454 is a wasteful number, since it uses less digits than its factorization.

20900454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483414.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20900454 is about 4571.7014338209. The cubic root of 20900454 is about 275.4557907022.

The spelling of 20900454 in words is "twenty million, nine hundred thousand, four hundred fifty-four".