20919880403 has 8 divisors (see below), whose sum is σ = 22112304720. Its totient is φ = 19736593920.

The previous prime is 20919880393. The next prime is 20919880411. The reversal of 20919880403 is 30408891902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20919880403 - 2⁸ = 20919880147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20919880463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2279750 + ... + 2288907.

It is an arithmetic number, because the mean of its divisors is an integer number (2764038090).

Almost surely, 2^20919880403 is an apocalyptic number.

20919880403 is a deficient number, since it is larger than the sum of its proper divisors (1192424317).

20919880403 is a wasteful number, since it uses less digits than its factorization.

20919880403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4568917.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 20919880403 in words is "twenty billion, nine hundred nineteen million, eight hundred eighty thousand, four hundred three".