20485451 has 16 divisors (see below), whose sum is σ = 24545280. Its totient is φ = 16727040.

The previous prime is 20485441. The next prime is 20485463. The reversal of 20485451 is 15458402.

It is a cyclic number.

It is not a de Polignac number, because 20485451 - 2¹⁴ = 20469067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20485441) 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, 13835 + ... + 15243.

It is an arithmetic number, because the mean of its divisors is an integer number (1534080).

Almost surely, 2^20485451 is an apocalyptic number.

20485451 is a deficient number, since it is larger than the sum of its proper divisors (4059829).

20485451 is a wasteful number, since it uses less digits than its factorization.

20485451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 20485451 is about 4526.0856156286. The cubic root of 20485451 is about 273.6204229579.

The spelling of 20485451 in words is "twenty million, four hundred eighty-five thousand, four hundred fifty-one".