20400026262406 has 64 divisors (see below), whose sum is σ = 35638576017408. Its totient is φ = 8577732699648.

The previous prime is 20400026262397. The next prime is 20400026262419. The reversal of 20400026262406 is 60426262000402.

It is a super-2 number, since 2×20400026262406² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 403591971 + ... + 403642513.

It is an arithmetic number, because the mean of its divisors is an integer number (556852750272).

Almost surely, 2^{20400026262406} is an apocalyptic number.

20400026262406 is a deficient number, since it is larger than the sum of its proper divisors (15238549755002).

20400026262406 is a wasteful number, since it uses less digits than its factorization.

20400026262406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53245.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 20400026262406 its reverse (60426262000402), we get a palindrome (80826288262808).

The spelling of 20400026262406 in words is "twenty trillion, four hundred billion, twenty-six million, two hundred sixty-two thousand, four hundred six".