20401320411 has 48 divisors (see below), whose sum is σ = 30172746240. Its totient is φ = 13280400000.

The previous prime is 20401320397. The next prime is 20401320419. The reversal of 20401320411 is 11402310402.

It is not a de Polignac number, because 20401320411 - 2¹⁹ = 20400796123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20401320419) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49880775 + ... + 49881183.

It is an arithmetic number, because the mean of its divisors is an integer number (628598880).

Almost surely, 2^20401320411 is an apocalyptic number.

20401320411 is a deficient number, since it is larger than the sum of its proper divisors (9771425829).

20401320411 is a wasteful number, since it uses less digits than its factorization.

20401320411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20401320411 its reverse (11402310402), we get a palindrome (31803630813).

The spelling of 20401320411 in words is "twenty billion, four hundred one million, three hundred twenty thousand, four hundred eleven".