20345031236426 has 16 divisors (see below), whose sum is σ = 32880843458568. Its totient is φ = 9385502131200.

The previous prime is 20345031236317. The next prime is 20345031236437. The reversal of 20345031236426 is 62463213054302.

It can be written as a sum of positive squares in 4 ways, for example, as 13107042733225 + 7237988503201 = 3620365^2 + 2690351^2 .

It is a super-2 number, since 2×20345031236426² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187956755 + ... + 188064966.

Almost surely, 2^{20345031236426} is an apocalyptic number.

20345031236426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20345031236426 is a deficient number, since it is larger than the sum of its proper divisors (12535812222142).

20345031236426 is a wasteful number, since it uses less digits than its factorization.

20345031236426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376023817.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 20345031236426 in words is "twenty trillion, three hundred forty-five billion, thirty-one million, two hundred thirty-six thousand, four hundred twenty-six".