19621121703 has 4 divisors (see below), whose sum is σ = 26161495608. Its totient is φ = 13080747800.

The previous prime is 19621121669. The next prime is 19621121783. The reversal of 19621121703 is 30712112691.

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 19621121703 - 2¹³ = 19621113511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621121783) 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, 3270186948 + ... + 3270186953.

It is an arithmetic number, because the mean of its divisors is an integer number (6540373902).

Almost surely, 2^19621121703 is an apocalyptic number.

19621121703 is a deficient number, since it is larger than the sum of its proper divisors (6540373905).

19621121703 is an equidigital number, since it uses as much as digits as its factorization.

19621121703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540373904.

The product of its (nonzero) digits is 4536, while the sum is 33.

The spelling of 19621121703 in words is "nineteen billion, six hundred twenty-one million, one hundred twenty-one thousand, seven hundred three".