20481953719 has 4 divisors (see below), whose sum is σ = 21686774544. Its totient is φ = 19277132896.

The previous prime is 20481953711. The next prime is 20481953749. The reversal of 20481953719 is 91735918402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20481953719 - 2³ = 20481953711 is a prime.

It is a super-2 number, since 2×20481953719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20481953711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602410387 + ... + 602410420.

It is an arithmetic number, because the mean of its divisors is an integer number (5421693636).

Almost surely, 2^20481953719 is an apocalyptic number.

20481953719 is a deficient number, since it is larger than the sum of its proper divisors (1204820825).

20481953719 is a wasteful number, since it uses less digits than its factorization.

20481953719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204820824.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 20481953719 in words is "twenty billion, four hundred eighty-one million, nine hundred fifty-three thousand, seven hundred nineteen".