10209197923 has 4 divisors (see below), whose sum is σ = 10209443128. Its totient is φ = 10208952720.

The previous prime is 10209197891. The next prime is 10209197939. The reversal of 10209197923 is 32979190201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32979190201 = 127 ⋅259678663.

It is a cyclic number.

It is not a de Polignac number, because 10209197923 - 2⁵ = 10209197891 is a prime.

It is a super-4 number, since 4×10209197923⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10209197923.

It is not an unprimeable number, because it can be changed into a prime (10209197983) 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, 42861 + ... + 149182.

It is an arithmetic number, because the mean of its divisors is an integer number (2552360782).

Almost surely, 2^10209197923 is an apocalyptic number.

10209197923 is a deficient number, since it is larger than the sum of its proper divisors (245205).

10209197923 is an equidigital number, since it uses as much as digits as its factorization.

10209197923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245204.

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 10209197923 in words is "ten billion, two hundred nine million, one hundred ninety-seven thousand, nine hundred twenty-three".