20420440442105 has 32 divisors (see below), whose sum is σ = 27306340627968. Its totient is φ = 14532393600000.

The previous prime is 20420440442093. The next prime is 20420440442177. The reversal of 20420440442105 is 50124404402402.

It is not a de Polignac number, because 20420440442105 - 2⁴ = 20420440442089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12444605 + ... + 13989605.

It is an arithmetic number, because the mean of its divisors is an integer number (853323144624).

Almost surely, 2^{20420440442105} is an apocalyptic number.

It is an amenable number.

20420440442105 is a deficient number, since it is larger than the sum of its proper divisors (6885900185863).

20420440442105 is a wasteful number, since it uses less digits than its factorization.

20420440442105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550177.

The product of its (nonzero) digits is 40960, while the sum is 32.

Adding to 20420440442105 its reverse (50124404402402), we get a palindrome (70544844844507).

The spelling of 20420440442105 in words is "twenty trillion, four hundred twenty billion, four hundred forty million, four hundred forty-two thousand, one hundred five".