20520232504015 has 16 divisors (see below), whose sum is σ = 24790800528000. Its totient is φ = 16305182836992.

The previous prime is 20520232504003. The next prime is 20520232504027. The reversal of 20520232504015 is 51040523202502.

It is an interprime number because it is at equal distance from previous prime (20520232504003) and next prime (20520232504027).

It is a cyclic number.

It is not a de Polignac number, because 20520232504015 - 2¹⁹ = 20520231979727 is a prime.

It is a super-2 number, since 2×20520232504015² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14205946 + ... + 15583624.

It is an arithmetic number, because the mean of its divisors is an integer number (1549425033000).

Almost surely, 2^{20520232504015} is an apocalyptic number.

20520232504015 is a deficient number, since it is larger than the sum of its proper divisors (4270568023985).

20520232504015 is a wasteful number, since it uses less digits than its factorization.

20520232504015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397826.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20520232504015 its reverse (51040523202502), we get a palindrome (71560755706517).

The spelling of 20520232504015 in words is "twenty trillion, five hundred twenty billion, two hundred thirty-two million, five hundred four thousand, fifteen".