20681454 has 16 divisors (see below), whose sum is σ = 41575248. Its totient is φ = 6858432.

The previous prime is 20681449. The next prime is 20681459. The reversal of 20681454 is 45418602.

It is an interprime number because it is at equal distance from previous prime (20681449) and next prime (20681459).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20681459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7567 + ... + 9930.

It is an arithmetic number, because the mean of its divisors is an integer number (2598453).

Almost surely, 2^20681454 is an apocalyptic number.

20681454 is an abundant number, since it is smaller than the sum of its proper divisors (20893794).

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

20681454 is a wasteful number, since it uses less digits than its factorization.

20681454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17699.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20681454 is about 4547.6866646681. The cubic root of 20681454 is about 274.4903132271.

The spelling of 20681454 in words is "twenty million, six hundred eighty-one thousand, four hundred fifty-four".