20451610105 has 8 divisors (see below), whose sum is σ = 24546330432. Its totient is φ = 16358355888.

The previous prime is 20451610099. The next prime is 20451610133. The reversal of 20451610105 is 50101615402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20451610105 - 2⁵ = 20451610073 is a prime.

It is a super-2 number, since 2×20451610105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20451610105.

It is an unprimeable number.

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, 335599 + ... + 391828.

It is an arithmetic number, because the mean of its divisors is an integer number (3068291304).

Almost surely, 2^20451610105 is an apocalyptic number.

It is an amenable number.

20451610105 is a deficient number, since it is larger than the sum of its proper divisors (4094720327).

20451610105 is an equidigital number, since it uses as much as digits as its factorization.

20451610105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733055.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 20451610105 in words is "twenty billion, four hundred fifty-one million, six hundred ten thousand, one hundred five".