20465442442064 has 10 divisors (see below), whose sum is σ = 39651794731530. Its totient is φ = 10232721221024.

The previous prime is 20465442442007. The next prime is 20465442442121. The reversal of 20465442442064 is 46024424456402.

It is an interprime number because it is at equal distance from previous prime (20465442442007) and next prime (20465442442121).

It can be written as a sum of positive squares in only one way, i.e., 19446336040000 + 1019106402064 = 4409800^2 + 1009508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639545076299 + ... + 639545076330.

It is an arithmetic number, because the mean of its divisors is an integer number (3965179473153).

Almost surely, 2^{20465442442064} is an apocalyptic number.

It is an amenable number.

20465442442064 is a deficient number, since it is larger than the sum of its proper divisors (19186352289466).

20465442442064 is a wasteful number, since it uses less digits than its factorization.

20465442442064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279090152637 (or 1279090152631 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 47.

Adding to 20465442442064 its reverse (46024424456402), we get a palindrome (66489866898466).

The spelling of 20465442442064 in words is "twenty trillion, four hundred sixty-five billion, four hundred forty-two million, four hundred forty-two thousand, sixty-four".