20454102 has 12 divisors (see below), whose sum is σ = 44317260. Its totient is φ = 6818028.

The previous prime is 20454097. The next prime is 20454103. The reversal of 20454102 is 20145402.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1136339 = 20454102 / (2 + 0 + 4 + 5 + 4 + 1 + 0 + 2).

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568152 + ... + 568187.

It is an arithmetic number, because the mean of its divisors is an integer number (3693105).

Almost surely, 2^20454102 is an apocalyptic number.

20454102 is an abundant number, since it is smaller than the sum of its proper divisors (23863158).

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

20454102 is a wasteful number, since it uses less digits than its factorization.

20454102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136347 (or 1136344 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20454102 is about 4522.6211426561. The cubic root of 20454102 is about 273.4807774135.

Adding to 20454102 its reverse (20145402), we get a palindrome (40599504).

The spelling of 20454102 in words is "twenty million, four hundred fifty-four thousand, one hundred two".