20015515332412 has 6 divisors (see below), whose sum is σ = 35027151831728. Its totient is φ = 10007757666204.

The previous prime is 20015515332409. The next prime is 20015515332419. The reversal of 20015515332412 is 21423351551002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015515332419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501939416548 + ... + 2501939416555.

Almost surely, 2^{20015515332412} is an apocalyptic number.

It is an amenable number.

20015515332412 is a deficient number, since it is larger than the sum of its proper divisors (15011636499316).

20015515332412 is a wasteful number, since it uses less digits than its factorization.

20015515332412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003878833107 (or 5003878833105 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 20015515332412 its reverse (21423351551002), we get a palindrome (41438866883414).

The spelling of 20015515332412 in words is "twenty trillion, fifteen billion, five hundred fifteen million, three hundred thirty-two thousand, four hundred twelve".