20540454 has 32 divisors (see below), whose sum is σ = 47454336. Its totient is φ = 5857920.

The previous prime is 20540453. The next prime is 20540459. The reversal of 20540454 is 45404502.

It is a super-2 number, since 2×20540454² = 843820501052232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8032 + ... + 10275.

It is an arithmetic number, because the mean of its divisors is an integer number (1482948).

Almost surely, 2^20540454 is an apocalyptic number.

20540454 is an abundant number, since it is smaller than the sum of its proper divisors (26913882).

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

20540454 is a wasteful number, since it uses less digits than its factorization.

20540454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18340.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20540454 is about 4532.1577642443. The cubic root of 20540454 is about 273.8650924486.

Adding to 20540454 its reverse (45404502), we get a palindrome (65944956).

The spelling of 20540454 in words is "twenty million, five hundred forty thousand, four hundred fifty-four".