20454233413 has 4 divisors (see below), whose sum is σ = 20713147840. Its totient is φ = 20195318988.

The previous prime is 20454233341. The next prime is 20454233447. The reversal of 20454233413 is 31433245402.

It is a happy number.

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 20454233413 - 2¹³ = 20454225221 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 (20424233413) 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, 129457095 + ... + 129457252.

It is an arithmetic number, because the mean of its divisors is an integer number (5178286960).

Almost surely, 2^20454233413 is an apocalyptic number.

It is an amenable number.

20454233413 is a deficient number, since it is larger than the sum of its proper divisors (258914427).

20454233413 is an equidigital number, since it uses as much as digits as its factorization.

20454233413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258914426.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 20454233413 its reverse (31433245402), we get a palindrome (51887478815).

The spelling of 20454233413 in words is "twenty billion, four hundred fifty-four million, two hundred thirty-three thousand, four hundred thirteen".