20669454 has 48 divisors (see below), whose sum is σ = 50778000. Its totient is φ = 6023808.

The previous prime is 20669443. The next prime is 20669459. The reversal of 20669454 is 45496602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20669459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2122 + ... + 6770.

It is an arithmetic number, because the mean of its divisors is an integer number (1057875).

Almost surely, 2^20669454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20669454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25389000).

20669454 is an abundant number, since it is smaller than the sum of its proper divisors (30108546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20669454 is a wasteful number, since it uses less digits than its factorization.

20669454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689 (or 4686 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 20669454 is about 4546.3671211199. The cubic root of 20669454 is about 274.4372137846.

The spelling of 20669454 in words is "twenty million, six hundred sixty-nine thousand, four hundred fifty-four".