20741968969 has 4 divisors (see below), whose sum is σ = 20866172544. Its totient is φ = 20617765396.

The previous prime is 20741968931. The next prime is 20741968993. The reversal of 20741968969 is 96986914702.

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 20741968969 - 2²⁵ = 20708414537 is a prime.

It is a super-2 number, since 2×20741968969² (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 (20741968999) 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, 62101537 + ... + 62101870.

It is an arithmetic number, because the mean of its divisors is an integer number (5216543136).

Almost surely, 2^20741968969 is an apocalyptic number.

It is an amenable number.

20741968969 is a deficient number, since it is larger than the sum of its proper divisors (124203575).

20741968969 is a wasteful number, since it uses less digits than its factorization.

20741968969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124203574.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 20741968969 in words is "twenty billion, seven hundred forty-one million, nine hundred sixty-eight thousand, nine hundred sixty-nine".