20102454 has 24 divisors (see below), whose sum is σ = 43670952. Its totient is φ = 6683040.

The previous prime is 20102441. The next prime is 20102461. The reversal of 20102454 is 45420102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6714 + ... + 9234.

It is an arithmetic number, because the mean of its divisors is an integer number (1819623).

Almost surely, 2^20102454 is an apocalyptic number.

20102454 is an abundant number, since it is smaller than the sum of its proper divisors (23568498).

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

20102454 is a wasteful number, since it uses less digits than its factorization.

20102454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2969 counting only the distinct ones).

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

The square root of 20102454 is about 4483.5760281275. The cubic root of 20102454 is about 271.9044773429.

Adding to 20102454 its reverse (45420102), we get a palindrome (65522556).

The spelling of 20102454 in words is "twenty million, one hundred two thousand, four hundred fifty-four".