20403211634311 has 16 divisors (see below), whose sum is σ = 22643335332000. Its totient is φ = 18227850710400.

The previous prime is 20403211634287. The next prime is 20403211634353. The reversal of 20403211634311 is 11343611230402.

It is a cyclic number.

It is not a de Polignac number, because 20403211634311 - 2²⁷ = 20403077416583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403211634411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12965136 + ... + 14453413.

It is an arithmetic number, because the mean of its divisors is an integer number (1415208458250).

Almost surely, 2^{20403211634311} is an apocalyptic number.

20403211634311 is a deficient number, since it is larger than the sum of its proper divisors (2240123697689).

20403211634311 is a wasteful number, since it uses less digits than its factorization.

20403211634311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27419730.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 20403211634311 its reverse (11343611230402), we get a palindrome (31746822864713).

The spelling of 20403211634311 in words is "twenty trillion, four hundred three billion, two hundred eleven million, six hundred thirty-four thousand, three hundred eleven".