20401523310541 has 4 divisors (see below), whose sum is σ = 20431393769952. Its totient is φ = 20371652851132.

The previous prime is 20401523310523. The next prime is 20401523310557. The reversal of 20401523310541 is 14501332510402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20401523310541 - 2³³ = 20392933375949 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 (20401523313541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14935228681 + ... + 14935230046.

It is an arithmetic number, because the mean of its divisors is an integer number (5107848442488).

Almost surely, 2^{20401523310541} is an apocalyptic number.

It is an amenable number.

20401523310541 is a deficient number, since it is larger than the sum of its proper divisors (29870459411).

20401523310541 is an equidigital number, since it uses as much as digits as its factorization.

20401523310541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29870459410.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 20401523310541 its reverse (14501332510402), we get a palindrome (34902855820943).

The spelling of 20401523310541 in words is "twenty trillion, four hundred one billion, five hundred twenty-three million, three hundred ten thousand, five hundred forty-one".