20880197919 has 48 divisors (see below), whose sum is σ = 34631238720. Its totient is φ = 11875507200.

The previous prime is 20880197909. The next prime is 20880198019. The reversal of 20880197919 is 91979108802.

It is not a de Polignac number, because 20880197919 - 2⁴ = 20880197903 is a prime.

It is a super-2 number, since 2×20880197919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20880197909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20942529 + ... + 20943525.

It is an arithmetic number, because the mean of its divisors is an integer number (721484140).

Almost surely, 2^20880197919 is an apocalyptic number.

20880197919 is a deficient number, since it is larger than the sum of its proper divisors (13751040801).

20880197919 is a wasteful number, since it uses less digits than its factorization.

20880197919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240 (or 2237 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 54.

The spelling of 20880197919 in words is "twenty billion, eight hundred eighty million, one hundred ninety-seven thousand, nine hundred nineteen".