20414203156461 has 4 divisors (see below), whose sum is σ = 27218937541952. Its totient is φ = 13609468770972.

The previous prime is 20414203156453. The next prime is 20414203156489. The reversal of 20414203156461 is 16465130241402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20414203156461 - 2³ = 20414203156453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20414203156421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3402367192741 + ... + 3402367192746.

It is an arithmetic number, because the mean of its divisors is an integer number (6804734385488).

Almost surely, 2^{20414203156461} is an apocalyptic number.

It is an amenable number.

20414203156461 is a deficient number, since it is larger than the sum of its proper divisors (6804734385491).

20414203156461 is an equidigital number, since it uses as much as digits as its factorization.

20414203156461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804734385490.

The product of its (nonzero) digits is 138240, while the sum is 39.

Adding to 20414203156461 its reverse (16465130241402), we get a palindrome (36879333397863).

The spelling of 20414203156461 in words is "twenty trillion, four hundred fourteen billion, two hundred three million, one hundred fifty-six thousand, four hundred sixty-one".