20403211535441 has 16 divisors (see below), whose sum is σ = 23331448928256. Its totient is φ = 17478348714576.

The previous prime is 20403211535423. The next prime is 20403211535513. The reversal of 20403211535441 is 14453511230402.

It is a cyclic number.

It is not a de Polignac number, because 20403211535441 - 2²² = 20403207341137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20403211535141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214526600 + ... + 214621686.

It is an arithmetic number, because the mean of its divisors is an integer number (1458215558016).

Almost surely, 2^{20403211535441} is an apocalyptic number.

It is an amenable number.

20403211535441 is a deficient number, since it is larger than the sum of its proper divisors (2928237392815).

20403211535441 is a wasteful number, since it uses less digits than its factorization.

20403211535441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112508.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 20403211535441 its reverse (14453511230402), we get a palindrome (34856722765843).

The spelling of 20403211535441 in words is "twenty trillion, four hundred three billion, two hundred eleven million, five hundred thirty-five thousand, four hundred forty-one".