21965428703 has 4 divisors (see below), whose sum is σ = 22379870808. Its totient is φ = 21550986600.

The previous prime is 21965428691. The next prime is 21965428729. The reversal of 21965428703 is 30782456912.

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 21965428703 - 2⁴ = 21965428687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21965428753) 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, 207220973 + ... + 207221078.

It is an arithmetic number, because the mean of its divisors is an integer number (5594967702).

It is a 1-persistent number, because it is pandigital, but 2⋅21965428703 = 43930857406 is not.

Almost surely, 2^21965428703 is an apocalyptic number.

21965428703 is a deficient number, since it is larger than the sum of its proper divisors (414442105).

21965428703 is an equidigital number, since it uses as much as digits as its factorization.

21965428703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414442104.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 21965428703 in words is "twenty-one billion, nine hundred sixty-five million, four hundred twenty-eight thousand, seven hundred three".