20500105254 has 32 divisors (see below), whose sum is σ = 41235333120. Its totient is φ = 6794217600.

The previous prime is 20500105253. The next prime is 20500105259. The reversal of 20500105254 is 45250100502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500105253) 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, 3537099 + ... + 3542889.

It is an arithmetic number, because the mean of its divisors is an integer number (1288604160).

Almost surely, 2^20500105254 is an apocalyptic number.

20500105254 is an abundant number, since it is smaller than the sum of its proper divisors (20735227866).

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

20500105254 is a wasteful number, since it uses less digits than its factorization.

20500105254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076.

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 20500105254 its reverse (45250100502), we get a palindrome (65750205756).

The spelling of 20500105254 in words is "twenty billion, five hundred million, one hundred five thousand, two hundred fifty-four".