20151815102 has 16 divisors (see below), whose sum is σ = 31673963520. Its totient is φ = 9597493752.

The previous prime is 20151815029. The next prime is 20151815119.

20151815102 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905498 + ... + 927485.

It is an arithmetic number, because the mean of its divisors is an integer number (1979622720).

Almost surely, 2^20151815102 is an apocalyptic number.

20151815102 is a deficient number, since it is larger than the sum of its proper divisors (11522148418).

20151815102 is a wasteful number, since it uses less digits than its factorization.

20151815102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833247.

The product of its (nonzero) digits is 800, while the sum is 26.

The spelling of 20151815102 in words is "twenty billion, one hundred fifty-one million, eight hundred fifteen thousand, one hundred two".