20412254145551 has 8 divisors (see below), whose sum is σ = 20456668458240. Its totient is φ = 20367886959648.

The previous prime is 20412254145467. The next prime is 20412254145643. The reversal of 20412254145551 is 15554145221402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20412254145551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20412254145499 and 20412254145508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412254165551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10914416 + ... + 12647093.

It is an arithmetic number, because the mean of its divisors is an integer number (2557083557280).

Almost surely, 2^{20412254145551} is an apocalyptic number.

20412254145551 is a deficient number, since it is larger than the sum of its proper divisors (44414312689).

20412254145551 is a wasteful number, since it uses less digits than its factorization.

20412254145551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23563393.

The product of its (nonzero) digits is 320000, while the sum is 41.

Adding to 20412254145551 its reverse (15554145221402), we get a palindrome (35966399366953).

The spelling of 20412254145551 in words is "twenty trillion, four hundred twelve billion, two hundred fifty-four million, one hundred forty-five thousand, five hundred fifty-one".