21379195203 has 4 divisors (see below), whose sum is σ = 28505593608. Its totient is φ = 14252796800.

The previous prime is 21379195193. The next prime is 21379195207. The reversal of 21379195203 is 30259197312.

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 21379195203 - 2²⁰ = 21378146627 is a prime.

It is a super-2 number, since 2×21379195203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21379195207) 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, 3563199198 + ... + 3563199203.

It is an arithmetic number, because the mean of its divisors is an integer number (7126398402).

Almost surely, 2^21379195203 is an apocalyptic number.

21379195203 is a deficient number, since it is larger than the sum of its proper divisors (7126398405).

21379195203 is an equidigital number, since it uses as much as digits as its factorization.

21379195203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7126398404.

The product of its (nonzero) digits is 102060, while the sum is 42.

The spelling of 21379195203 in words is "twenty-one billion, three hundred seventy-nine million, one hundred ninety-five thousand, two hundred three".