20613719090 has 8 divisors (see below), whose sum is σ = 37104694380. Its totient is φ = 8245487632.

The previous prime is 20613719089. The next prime is 20613719149. The reversal of 20613719090 is 9091731602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20327060329 + 286658761 = 142573^2 + 16931^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030685945 + ... + 1030685964.

Almost surely, 2^20613719090 is an apocalyptic number.

20613719090 is a deficient number, since it is larger than the sum of its proper divisors (16490975290).

20613719090 is a wasteful number, since it uses less digits than its factorization.

20613719090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061371916.

The product of its (nonzero) digits is 20412, while the sum is 38.

The spelling of 20613719090 in words is "twenty billion, six hundred thirteen million, seven hundred nineteen thousand, ninety".