20880258479 has 2 divisors, whose sum is σ = 20880258480. Its totient is φ = 20880258478.

The previous prime is 20880258263. The next prime is 20880258491. The reversal of 20880258479 is 97485208802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20880258479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20880258479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20880258499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10440129239 + 10440129240.

It is an arithmetic number, because the mean of its divisors is an integer number (10440129240).

Almost surely, 2^20880258479 is an apocalyptic number.

20880258479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20880258479 is an equidigital number, since it uses as much as digits as its factorization.

20880258479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2580480, while the sum is 53.

The spelling of 20880258479 in words is "twenty billion, eight hundred eighty million, two hundred fifty-eight thousand, four hundred seventy-nine".