20726454 has 48 divisors (see below), whose sum is σ = 50035968. Its totient is φ = 5606064.

The previous prime is 20726441. The next prime is 20726471. The reversal of 20726454 is 45462702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14479 + ... + 15845.

It is an arithmetic number, because the mean of its divisors is an integer number (1042416).

Almost surely, 2^20726454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20726454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25017984).

20726454 is an abundant number, since it is smaller than the sum of its proper divisors (29309514).

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

20726454 is a wasteful number, since it uses less digits than its factorization.

20726454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 20726454 is about 4552.6315466991. The cubic root of 20726454 is about 274.6892534002.

The spelling of 20726454 in words is "twenty million, seven hundred twenty-six thousand, four hundred fifty-four".