20515255102 has 8 divisors (see below), whose sum is σ = 31071648816. Its totient is φ = 10158038832.

The previous prime is 20515255063. The next prime is 20515255129. The reversal of 20515255102 is 20155251502.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49794103 + ... + 49794514.

It is an arithmetic number, because the mean of its divisors is an integer number (3883956102).

Almost surely, 2^20515255102 is an apocalyptic number.

20515255102 is a deficient number, since it is larger than the sum of its proper divisors (10556393714).

20515255102 is a wasteful number, since it uses less digits than its factorization.

20515255102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99588722.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 20515255102 in words is "twenty billion, five hundred fifteen million, two hundred fifty-five thousand, one hundred two".