20520105254 has 8 divisors (see below), whose sum is σ = 33578354088. Its totient is φ = 9327320560.

The previous prime is 20520105233. The next prime is 20520105283. The reversal of 20520105254 is 45250102502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466366007 + ... + 466366050.

It is an arithmetic number, because the mean of its divisors is an integer number (4197294261).

Almost surely, 2^20520105254 is an apocalyptic number.

20520105254 is a deficient number, since it is larger than the sum of its proper divisors (13058248834).

20520105254 is a wasteful number, since it uses less digits than its factorization.

20520105254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932732070.

The product of its (nonzero) digits is 4000, while the sum is 26.

Adding to 20520105254 its reverse (45250102502), we get a palindrome (65770207756).

The spelling of 20520105254 in words is "twenty billion, five hundred twenty million, one hundred five thousand, two hundred fifty-four".