20545421614405 has 8 divisors (see below), whose sum is σ = 24658822992384. Its totient is φ = 16433459254800.

The previous prime is 20545421614391. The next prime is 20545421614463. The reversal of 20545421614405 is 50441612454502.

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

It is a de Polignac number, because none of the positive numbers 2^k-20545421614405 is a prime.

It is a super-2 number, since 2×20545421614405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359723181 + ... + 359780290.

It is an arithmetic number, because the mean of its divisors is an integer number (3082352874048).

Almost surely, 2^{20545421614405} is an apocalyptic number.

It is an amenable number.

20545421614405 is a deficient number, since it is larger than the sum of its proper divisors (4113401377979).

20545421614405 is an equidigital number, since it uses as much as digits as its factorization.

20545421614405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719509187.

The product of its (nonzero) digits is 768000, while the sum is 43.

The spelling of 20545421614405 in words is "twenty trillion, five hundred forty-five billion, four hundred twenty-one million, six hundred fourteen thousand, four hundred five".