20413344552531 has 12 divisors (see below), whose sum is σ = 31661514000072. Its totient is φ = 11664768315648.

The previous prime is 20413344552481. The next prime is 20413344552553. The reversal of 20413344552531 is 13525544331402.

It is not a de Polignac number, because 20413344552531 - 2²¹ = 20413342455379 is a prime.

It is a super-2 number, since 2×20413344552531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20413344551531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69433144590 + ... + 69433144883.

It is an arithmetic number, because the mean of its divisors is an integer number (2638459500006).

Almost surely, 2^{20413344552531} is an apocalyptic number.

20413344552531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20413344552531 is a deficient number, since it is larger than the sum of its proper divisors (11248169447541).

20413344552531 is a wasteful number, since it uses less digits than its factorization.

20413344552531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138866289490 (or 138866289483 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 20413344552531 its reverse (13525544331402), we get a palindrome (33938888883933).

The spelling of 20413344552531 in words is "twenty trillion, four hundred thirteen billion, three hundred forty-four million, five hundred fifty-two thousand, five hundred thirty-one".