20403053705 has 8 divisors (see below), whose sum is σ = 24513203400. Its totient is φ = 16302750336.

The previous prime is 20403053687. The next prime is 20403053729. The reversal of 20403053705 is 50735030402.

It can be written as a sum of positive squares in 4 ways, for example, as 2995153984 + 17407899721 = 54728^2 + 131939^2 .

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 20403053705 - 2⁶ = 20403053641 is a prime.

It is a super-2 number, since 2×20403053705² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 2457020 + ... + 2465309.

It is an arithmetic number, because the mean of its divisors is an integer number (3064150425).

Almost surely, 2^20403053705 is an apocalyptic number.

It is an amenable number.

20403053705 is a deficient number, since it is larger than the sum of its proper divisors (4110149695).

20403053705 is an equidigital number, since it uses as much as digits as its factorization.

20403053705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923163.

The product of its (nonzero) digits is 12600, while the sum is 29.

The spelling of 20403053705 in words is "twenty billion, four hundred three million, fifty-three thousand, seven hundred five".