20351646610216 has 32 divisors (see below), whose sum is σ = 38682492719400. Its totient is φ = 10036318279680.

The previous prime is 20351646610193. The next prime is 20351646610259. The reversal of 20351646610216 is 61201664615302.

It can be written as a sum of positive squares in 4 ways, for example, as 19459479464100 + 892167146116 = 4411290^2 + 944546^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87203730 + ... + 87436798.

Almost surely, 2^{20351646610216} is an apocalyptic number.

It is an amenable number.

20351646610216 is a deficient number, since it is larger than the sum of its proper divisors (18330846109184).

20351646610216 is a wasteful number, since it uses less digits than its factorization.

20351646610216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382669 (or 382665 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 20351646610216 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-six million, six hundred ten thousand, two hundred sixteen".