20354461602064 has 20 divisors (see below), whose sum is σ = 39636956006604. Its totient is φ = 10125569729408.

The previous prime is 20354461602061. The next prime is 20354461602067. The reversal of 20354461602064 is 46020616445302.

It is an interprime number because it is at equal distance from previous prime (20354461602061) and next prime (20354461602067).

It can be written as a sum of positive squares in 2 ways, for example, as 16920882250000 + 3433579352064 = 4113500^2 + 1852992^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20354461602064.

It is not an unprimeable number, because it can be changed into a prime (20354461602061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3228813727 + ... + 3228820030.

Almost surely, 2^{20354461602064} is an apocalyptic number.

It is an amenable number.

20354461602064 is a deficient number, since it is larger than the sum of its proper divisors (19282494404540).

20354461602064 is a wasteful number, since it uses less digits than its factorization.

20354461602064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457633962 (or 6457633956 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 20354461602064 in words is "twenty trillion, three hundred fifty-four billion, four hundred sixty-one million, six hundred two thousand, sixty-four".