20415520405023 has 8 divisors (see below), whose sum is σ = 27220772354736. Its totient is φ = 13610307696000.

The previous prime is 20415520405003. The next prime is 20415520405079. The reversal of 20415520405023 is 32050402551402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20415520405023 - 2¹⁴ = 20415520388639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415520405003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8573968 + ... + 10693173.

It is an arithmetic number, because the mean of its divisors is an integer number (3402596544342).

Almost surely, 2^{20415520405023} is an apocalyptic number.

20415520405023 is a deficient number, since it is larger than the sum of its proper divisors (6805251949713).

20415520405023 is a wasteful number, since it uses less digits than its factorization.

20415520405023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19620345.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 20415520405023 its reverse (32050402551402), we get a palindrome (52465922956425).

The spelling of 20415520405023 in words is "twenty trillion, four hundred fifteen billion, five hundred twenty million, four hundred five thousand, twenty-three".