20552511479 has 2 divisors, whose sum is σ = 20552511480. Its totient is φ = 20552511478.

The previous prime is 20552511431. The next prime is 20552511481. The reversal of 20552511479 is 97411525502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20552511479 - 2³² = 16257544183 is a prime.

Together with 20552511481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20552511179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276255739 + 10276255740.

It is an arithmetic number, because the mean of its divisors is an integer number (10276255740).

Almost surely, 2^20552511479 is an apocalyptic number.

20552511479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20552511479 is an equidigital number, since it uses as much as digits as its factorization.

20552511479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 20552511479 in words is "twenty billion, five hundred fifty-two million, five hundred eleven thousand, four hundred seventy-nine".