20261210969 has 4 divisors (see below), whose sum is σ = 20280864000. Its totient is φ = 20241557940.

The previous prime is 20261210953. The next prime is 20261210993. The reversal of 20261210969 is 96901216202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20261210969 - 2⁴ = 20261210953 is a prime.

It is a super-2 number, since 2×20261210969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20261210069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9824969 + ... + 9827030.

It is an arithmetic number, because the mean of its divisors is an integer number (5070216000).

Almost surely, 2^20261210969 is an apocalyptic number.

It is an amenable number.

20261210969 is a deficient number, since it is larger than the sum of its proper divisors (19653031).

20261210969 is a wasteful number, since it uses less digits than its factorization.

20261210969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19653030.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 20261210969 in words is "twenty billion, two hundred sixty-one million, two hundred ten thousand, nine hundred sixty-nine".