20488633511 has 2 divisors, whose sum is σ = 20488633512. Its totient is φ = 20488633510.

The previous prime is 20488633481. The next prime is 20488633537. The reversal of 20488633511 is 11533688402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20488633511 - 2¹⁰ = 20488632487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20488633541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244316755 + 10244316756.

It is an arithmetic number, because the mean of its divisors is an integer number (10244316756).

Almost surely, 2^20488633511 is an apocalyptic number.

20488633511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488633511 is an equidigital number, since it uses as much as digits as its factorization.

20488633511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 20488633511 in words is "twenty billion, four hundred eighty-eight million, six hundred thirty-three thousand, five hundred eleven".