20413514215551 has 24 divisors (see below), whose sum is σ = 28758329299584. Its totient is φ = 12878209987920.

The previous prime is 20413514215537. The next prime is 20413514215597. The reversal of 20413514215551 is 15551241531402.

It is not a de Polignac number, because 20413514215551 - 2³⁸ = 20138636308607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413514215511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9664545 + ... + 11585786.

It is an arithmetic number, because the mean of its divisors is an integer number (1198263720816).

Almost surely, 2^{20413514215551} is an apocalyptic number.

20413514215551 is a deficient number, since it is larger than the sum of its proper divisors (8344815084033).

20413514215551 is a wasteful number, since it uses less digits than its factorization.

20413514215551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21251259 (or 21251240 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 39.

Adding to 20413514215551 its reverse (15551241531402), we get a palindrome (35964755746953).

The spelling of 20413514215551 in words is "twenty trillion, four hundred thirteen billion, five hundred fourteen million, two hundred fifteen thousand, five hundred fifty-one".